Yes the conform very well. They will fold in half. You can also depress the center as with any "Bean Bag" and lay it on a wing rib cap strip. Same with sheeting...

Apparently Lineco also manufactures rigid weights.

That's why I posted it. For the "majority" of kit builders they will work great and last forever. I bought a dozen of them.

I've learned my lesson, If I come up with anything else that makes my life easier I'll remember to keep it to myself...