Hello Barry. I'll get the part numbers and post them for you and others. I still have the bags somewhere. Most good model railroad hobby shops have them. They are with the 'structural' plastic stock shapes. I glued a small L beam inside the I beam as a guide to take up the slop in and out. With this in place, it runs true in rails and the canopy stays tight to the rails.

Your rails work great. I didn't even have to cut the length. For this 1/5 scale size, they were just the right length. If you want to use our plane on your site, you are welcome to.[sm=thumbs_up.gif]