I found this in my travels, some good info on Rivnuts and riveting
LocostUSA.com • View topic - Rivets and Rivnuts 101 and also this on notching tube.
LocostUSA.com • View topic - Alternitive to Hole saw notching(chopsaw mitering)
LocostUSA.com • View topic - Rivets and Rivnuts 101 and also this on notching tube.
LocostUSA.com • View topic - Alternitive to Hole saw notching(chopsaw mitering)