Instructables user Croy9000 writes:

I love my PanaVise Jr. But about half the time I go to use it I find its just not wide enough to hold what I’m working on. At only a 3″ opening, it only holds the smaller of my projects.
After disassembling the vise to see how I might be able to extend the opening, I discovered it was very doable. This Instructable documents how I was able to extend it to a 7¼” opening for only $7 in parts! The end result is a product that looks as good and works better than the original.

Nice “big mouth” panavise mod!