it's quite thick but i bolted a 2x4 to the back of it anyway. i
originally wanted something i could bend, but it was way too wobbly
because the really big piano strings (which i use because of their low
freq,length and availability) produce a huge amount of tension. it was
a little scary, could easily lose an eye if one of those strings popped
off at the end. i made a 'drone bass' years ago out of a piece of
poplar that i play by bending, but that one just has electric bass
strings. check this out: i played the drone bass through an olk HK tube
amp into some 18" woofers that were in the back of my old '64 plymouth
station wagon. i miked the wagon inside and out. it was inside the
garage and the matel garage door was humming like a giant snare drum!
it sounded great but doing that i realized i needed much better mics to
capture the whole sound.