HI Dave,
Thanks for the great videos, pics and review. You are dead correct that the UTS-15 needs to be used forcefully. Further disassembly of the shotgun is a little more complicated but once you have done it once it really isn't as big a deal as it looks to start. I don't recommend taking it down any further unless you have a really good diagram to go by the first time, and truthfully there isn't any need to take it down any farther.