Unfortunately, I've been unable to locate these prominent letters on the carburetor. I can clearly see where WALBRO is but nothing more. Where would I find the model numbers in regard to "WALBRO"? Should they they be on the same side? On the back side...that is not so accessible? If you would point me into the right direction, I will look for them. Thank you!

There are some youtub and good listed instructions on rebuilding carbs. Generic and specific, which I have found, close enough for most small 2-cycle carbs. The most challenging part I found was trying to replace the small fuel screen in the carb. This taught me to clean the screen w/o removing it with less psi from compressed carb cleaner or compressed air. I also find the fine screen being restricted and hard or cracked diaphragms as being common problems in the small carbs. Below are 2& 4-cycle youtube and text examples different, which works similar enough. Digital Pics before pulling your fuel lined and in disassembly stages could save you from pulling your hair. LOL & Good Luck! http://www.youtube.com/watch?v=VGq1wuBNM00 http://www.ereplacementparts.com/article/4582/How_to_Clean_a_2_Cycle_Engine_Carburetor.html

Fascinating! Could you address slab thickness? We mostly are seeing 2 cm, but at one place that both sells and fabricates slabs, they carry 5 cm and say thats better for the edge. Prices seem to be about the same.

Antartide quartzite slabs - do you know anything about this type of quartzite? I can't find information anywhere on line. The slabs show alot of mineral and have some sparkle; ranges in color from white/gray/tan to faint greens, blues and deep burgandy. Thanks.