Have two smk's that I bought for my boys. Will do one and then compare it against the other. They are exactly the same, same model, same Welsh Willy kit..hopefully, I can judge any improvement by direct comparison..
Might drill into stock to try to get more silkaflex material in..kind of buttoning for force distribution...
More hopeful about the silkaflex as it will bond with the wood really well..not sure how the membrane would work...need to see it..