Learn From Others Mistakes
Here are some mistakes that I have made.
Hopefully someone will be able to "Learn from others mistakes".
De-burring 13xx Air Tubes.
I forgot to remove the burrs from all the places they can hide. The result, nicked O-rings and pump cups.
Photo's courtesy of Gil
Here's a How to that Gil sent me.
13xx Role Pin Removal
Here's another "How To" that Gil made.