Well, we have windows. The operation was a success. I left the furnace on in the garage overnite to cure the silicone, and this morning I glued the 3/8" wide x 1/4" thick closed cell foam weatherstripping onto the aluminum bottom channel. I had to make a few last minute adjustments to the Marguard with my trusty Dremel tool, but now the windows slide into place very easily, and the foam seals the gap at the bottom of the window very well. This has been a very good project, in that I didn't scratch any paint, didn't mark up the top material in any way, and didn't break anything. My total cost for the project, including taxes amounted to about $230 for everything. These windows are never going to be equivalent to roll up windows mounted in the doors, but they will be darn close. I think my 2500 mile round trip to the Atlantic nationals just got a lot more comfortable. I hope that all who followed this post enjoyed it.---Brian