Apples55 posted:Dave;
I used the 1/2 in. version of the product mentioned by Moonman. Also got it from Home Depot. The 1/2 in. version was much easier to handle. There are absolutely no voids in the edges and the top/bottom veneers certainly look cabinet grade. They've been down in my basement for 6 months with no warping issues. I topped the plywood with 1/2 in. Homasote, also from HD.
I will certainly look at that because my preference is to use 1/2" plywood, but I don't intend to add the Homasote. The main reason I'm considering the 3/4" is because I'd need to use that to rip the 3" strips for framing and I honestly didn't realize my spacing was that close to Jim Barrett's.....and he doesn't use Homasote either. I guess I still don't see why so many push the more expensive 3/4" plywood and solid wood 1x4 framing when many others have success using 1/2" and ripped plywood. I assume you used 1x4s for your framing? Poplar?
As you can see, I'm still having a hard time deciding between 1/2" and 3/4" and many of those same questions keep me from deciding between Atlas and ScaleTrax. I want to use 1/2" and ScaleTrax and I think the visit to the hobby shop in Alabama next month will settle the track decision, but so many warn against 1/2" and I still don't know why. I've yet to see anyone refute Jim Barrett's system.
Thinking about it just now though, I really wouldn't have much to lose by buying a sheet of each, ripping the 3/4" to make the framing for a module and covering it with the 1/2" to see what I think. I can always find a use for scrap 1/2" around the house if I don't like the results. I could probably get HD to rip the 3/4" into 3" strips and make the 30" cut on the 1/2" to save myself the headache, especially since I can't get to my tools at the moment. We moved so much into the garage for the tile installation and now my wife wants to paint before we put it all back. If I do this, I could also see if I really want to check with Mianne. Sounds like a plan, doesn't it? 
