Im the new guy - figured out 9apd doesnt work on a 7spd wheel.
Im building my first bike. Had an 80s Miyata 610 with a busted fork (donor frame) and a 90s Aquila road bike with a cracked frame (donor wheels and components) that Im building in to a gravel bike.
The mech from the Aquila is 1055 series Shimano 105 which I understand can handle a 9speed...