Right you are about being too light with a gas boat, Marcel
! My mono is a bit too light. With my next scratch-build (cat) I'm not going to focus so much on light weight. I was thinking too much about weight because nitro boats need to be light.
Thank you for the thickness figures on the wood you used. I'm going to use 3mm (1/8" ) wood thickness for my ribs like you did.
Danny