Quote:

I'm assuming the shallow balancing holes are just to bring each particular balancer to neutral




Correct.. Neutral balanced

About the timing marks as long as you mark the new damper accurately thats a non-issue...

Personally I like dampers with no mark so I can accurately locate TDC with a dead stop & a degree wheel...


"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."