theo63, the warp is not that significant. I just like the parts to be exactly straight. I think I will try what some suggested by trying to remove it during the covering shrinking process. I'm just a bit disappointed in that I used the same board to build my BTE Delta Vortex and the Vortex is perfectly straight. However, the Venture wing has no method to prevent warping. If the wing is held at each end, the wing is very flexible when it is twisted. Bruce says in his directions that the covering is what gives the wing its torsional strength. Time will tell.