You bring me to another good point. By the time you're equipped to do everything you need, what have you spent? What is your time worth? I realized this and stopped casting 355 and just bought bulk powder coated stuff. Not for an airgun tho tbf.
It's like my whim to hot rod a notos I don't own yet, by the time I'm done I'm most of the way to a gun that came the way I wanted. I love the adventure and the process more than shooting tho. Problem solving is my joy. If that rings true for somebody else, by all means chase that project. I won't talk you out of it.
