In case you can't make out the #'s as follows:
- Bottom mount holes - 1 3/8"
- Bottom to top m hole - 5 1/4"
- Arm extension - 2 1/4" 5/16" hole
I just popped the C clip off
Only marks anywhere including the window is the # 75 on the crank arm.
Nothing else at all and i looked everywhere with a mag glass.
Hope things are clear enough.
Thanks for your help
Rob
