Without reading all the posts, the actual calculations that I use is to divide the drive pulley by the driven pulley. This method provides the final drive RPM. You can keep going on down the line with this calculation if intermediate pulley's are required. If variable speed is needed, then either use a VFD for AC motors or DC drive for DC motors. This will allow you to fine tune any mistakes or issues with final pulley size to come up with the exact RPM your wanting. DC drives are very inexpensive these days ($100). VFD (variable Frequency Drive) are a little more expensive, but not to bad for fractional HP motors. DC has more low end torque, if that's an issue. VFD's low end torque has really improved in the last several years.

A little excerpt from an article about AC sealers. Sadly what makes them work is what makes them a problem. "QUOTE" ------------------------------------------------------- Uh oh, what about violating the warranties? Understandably, none of the major manufacturers of original equipment parts or A/C equipment wants you to use any of these products. Finding sealant in a failed part can nullify the warranty. Heres what some of them say about A/C sealants. GM Bulletin No.: 03-01-38-001: March, 2003. "GM Service Operations DOES NOT endorse or approve the use of any aftermarket A/C system sealer, A/C stop-leak product or A/C seal conditioning product in any GM vehicle. The use of these aftermarket products may cause damage to A/C systems and to A/C service equipment. A/C system found to be contaminated with A/C system sealers, A/C stop-leak products, or seal conditioners are not covered by GM New Vehicle Warranty or the GM Replacement part Warranty." NAPA Temp: "NAPA TempÂs policy regarding the use of these products (A/C System Sealers) is that we DO NOT endorse its use and will deny all claims made against defective products returned for credit that are found to have been exposed to or suspected of containing said sealers." Delphi Product & Service Solutions: "Although pure leak detection dyes are permissible, Delphi does not approve the use of any type of air conditioning system sealants. The use of any sealant immediately voids all warranties of compressors. If it is determined that the compressor has failed due to the presence or evidence of any sealant, appropriate account adjustments will be made. Only Delphi compressors with an orange aftermarket label will be eligible for warranty." Visteon: "Visteon Automotive does not endorse or approve the use of any aftermarket A/C refrigerant system sealer. The use of such aftermarket refrigerant sealers show evidence of damaging A/C refrigerant recovery/evacuation/recharging equipment, as well as possible damage to A/C refrigerant system components. Vehicles found or suspected of having an A/C refrigerant sealer in the system should be serviced as a refrigerant system containing a contaminate. Visteon approved refrigerant system flushing equipment/agents may not remove the refrigerant system sealer from a contaminated system, and replacement of the entire A/C refrigerant system is recommended. Vehicle A/C refrigerant systems determined to be contaminated with an aftermarket refrigerant sealer may affect A/C refrigerant system components warranty." RTI Technologies: "RTI recovery/recycling machines are not designed to recover and recycle refrigerant system sealers. The RTI Technologies Warranty may be considered void if evidence of any refrigerant system sealer is found in any of the internal components of an RTI recovery/recycling machine. The owner of a contaminated machine may be advised the warranty is void and all charges for repair will be his responsibility." Mazda: "Do not use any aftermarket A/C refrigerant system sealer in the repair of Mazda vehicles. The use of such aftermarket refrigerant sealers may result in damage to A/C refrigerant recovery/evacuation/recharging equipment and/or A/C system components. A system found with or suspected of having an A/C refrigerant sealer in the system should be serviced as a refrigerant system containing a contaminant. Refrigerant system flushing equipment and agents may not remove the refrigerant system sealer from a contaminated system, and replacement of the entire A/C refrigerant system is recommended. These repairs will not be covered under the manufacturer's basic warranty." "Quote ---------------------------------------------------------

The Toshiba A135 received a Very Good rating from cnet. Cnet doesn't give very many $1000 affordable laptops that high of a rating. I recently bought the A135 2877, I believe is the model, the one with 2 gs of mem. (would recommend 2 gigs minimum for vista, from what I hear. It has a 180g hard drive, actually two seperate hard drives, a 100g plus an 80g. Great for backing up your system. With this much memory and hd space, you could collect a sizeable video and audio library (were talking hundreds of songs and movies). It runs Vista flawlessly. Yes, there are faster systems out there. I would have loved one with the Nvidia graphics card, which would give you a whopping 512m of shared graphics memory. The Intel that comes with the A135 has 256megs, acceptable. For about $1100 at costco online, I thinks it's one of the best deals out there. It was about $300 more than I wanted to spend on a laptop, but I'm just thinking where technology is going today, with streaming video, tv and music becomming more and more prevailant, before too long, anything less that 2 gigs of memory and a harddrive less than 100 gigs will probably be obsolete in the next couple years. I think this will be sufficient for our needs for some years to come. -- john

First-Don't take my suggestions alone. See what those who know better say, but for me: 512 mb SDRAM-that's a little light. It will likely do, but recommend 1 GB RAM for Windows Vista. Processor-Celeron is okay, but not sure what 336 (2.80, 533 FSB) means in Ghz. You want a fast processor. Mine is pretty good at 3.00 Ghz. Hard drive-ok Your video card will likely be compatible with your monitor. It doesn't sound like your monitor is widescreen but if it is, the screen resolution numbers will tell you if it is compatible. Sorry, not sure what those numbers should be. CD/DVD drive is okay, if you don't want to burn DVD's. I like to because they hold more. If you are mainly doing office work on it, it should be okay for you. I have always had Dells and love them. Hopefully, someone else who knows better will jump in. Good luck cristle.