Rofl, I have ALWAYs wanted a switch barrel setup.
The concept of packing one case and being able to hunt whatever I want on a trip is cool to me. I do have some extra frames and stock sets and keep some of the barrels on those, or the case gets too heavy anyway. lol The .357 sits on the wife's frame most of the time, because I have rounds I like better. For deer, I alternate between the .45-70 and .45 Colt. I love both of those barrels. The .223 is coming out more and more and with the superlite, I see that trend continuing. This summer going to be reworking the chamber one more time to get the .30-30 to eject consistently, then it goes under the chamber bore for a 30-40 to see if it'll clean up the issues. All in all though, I feel pretty blessed, because all the barrels I have put on my frames fit nearly perfectly.
The forearm screw is a 1/4-20 thumbscrew, but pretty low profile. It's smooth and looks nice, but can be a little hard to get to loosen up without slipping. I'm thinking of looking for a knurled one of similar height. I can swap barrels though without having to find a screw driver and I'm getting pretty quick...
Prolly not as quick as Quick though.
***edit***
Adding picture I found of a close up on my black stock set with one of the thumbscrews...