The ceiling tile I used for my LT-40 build was out in the garage for the last few months and became a little warped(wet fall/winter/spring in the NW)... enough that it would not provide a level surface to build on. I cut a 2' x 4' piece of 3/4" MDF board that is really flat for my pinning surface to mount to. I taped it down at several places to the MDF so now it's flat.



Got my build setup set up and glued up the spars... These things are quite a bit smaller than the LT-40s. Seemed tiny in comparison.



Was going to clothes pin them together but the stock was slightly warped so I pinned them down... was excited to get started, it didn't dawn on me to save my left wing plans from some extra pin holes. DOH!

To hold these down, I put the t-pins in at an angle and lined them up so that the top of the pins lay parellel to the stock and right over the top. Then turned them 90º. They are then flexing but also pushing down on the stock. Used a straight edge and a few pins to straighten them.



Cut and capped the wing tubes.



I'm using Titebond II for this build except where epoxy and CA is required.