Do you have any idea why the finish is failing, Brian? Our climate is extremely bland and mild and exposure to sun is limited due to the retro-ranchiness of the house (deep eaves, patios, etc.). My durability concerns are more how the patio doors would hold up to kids. Currently we have a metal patio slider that is still undinged and sliding well after 60+ years; I don't suppose I can expect that sort of performance from wood can I? :)

Somebody please correct me if I'm wrong, but I believe that the main offering from Norandex is a relabeled Simonton. Not a bad window by any means, but you may be able to find a product with superior ratings in the same price range. Where are you located?-- That will help to recommend the products that are available in your area. Couple other observations: - Good choice on going with the inserts. I sincerely believe that you'll be happier with the result. More efficient, less issues, better warranty, etc. Some sash kits can get pretty pricey as well. - Generally speaking, the guys that are most knowledgeable, passionate, and skilled when it comes to windows offer higher end products that may not be available from a supply house such as Norandex. In addition, it takes a fair amount of volume, quality, and an established company to have a direct purchase relationship with a manufacturer, whereas a supply house will sell to anyone with a pulse. Please understand that this does not mean that you won't get a good product or install, it is just a little riskier IMHO. If thi s particular guy seemed very knowledgeable, trustworthy, and represents a reputable company, then you could certainly do worse :)

Most of the liners are stapled to the frame. Move both sashes to the down position and pry the liner away from the frame a little. This should let you remove the staples. Then repeat the process for the bottom half. You should be able to remove the sashes and jamb liners in one motion. Some of the older systems will actually let you compress the liners and tilt the sash. (worth a try) WEAR SAFETY GLASSES, SOMETIMES THE SPRINGS TAKE OFF LIKE MISSILES!

Looks like there is enough room to work. Use a scrap of lumber ( 1 x 2 ?) to hold the weight. Cut the rope, and duct tape it to the new rope and pull the new rope up over the wheel. Then tie off the new rope onto the weight.