Peter_C
Contributor
I punched the hole in my Fusion to install my H valve with a hole punch kit. Not sure of the brand of the hole punch kit as I have owned it for 15+ years, but it is definitely not from Harbor Freight, and not Snap-on either. I didn't want to beat on the other side of my suit so I clamped a 2x4 in my vise, and slide the suit over it, so all the force was directed to my vise/tool box not the other side of the suit. I was then able to whale on it with my larger steel hammer. Took a decent amount of force to penetrate the Fusion inner shell.