I have a double chainset, BUT...
It was drilled by me in about 1993 with 8 5mm wide x 5mm deep holes staggered along the crank arms. Stupid I know but I thought it looked kinda cool then
. If you are under 12 stone I would say confidently that they are alright and you can have them for free. If more then they can stay on my shed wall!
Somerset, like 'Heartbeat' with newer cars!
Retro MTB: 1992 Cannondale M1000 Deore XT M730. 1992 Raleigh Dyna Tech Quantum Deore XT.
Retro Road: 1992 Eddy Merckx Corsa Extra Telekom Shimano 6500 Ultegra. 1993 Dyna Tech Ti Campagnolo Athena 8 Ergopower.
Modern: 2004 Wilier scandium Ultegra 6800. 2014 Wilier GTR Dura Ace 9000.