I think we've done most everything we've done in our Fursaver (except the CGC, and we won't be able to do the TDI in it, either, since they require flats), though I wouldn't be opposed to using her biothane...it is a really nice collar (and very, very green...lol)
I have gotten fingers pinched in the Fursaver once or twice, though not recently. I think it's because I went to the heavier link, which I can't fit my fingers inbetween too well. I have cracked a finger hooking it into the ring on the collar, though. No problems since I switched to a tab (which is really just one of those Coastal nylon keychain toggles) for the live-ring on my Fursaver and also on the prong..I never thought of using the rolled leather, though. We do have one of those, too, though I can't think of the last time I've used it.
I think I just like collars...lol. You'd swear I had eleven dogs...a biothane flat, two nylon flats, a rolled leather, a prong, a Fursaver, a nylon slip, a leather-chain combo show collar, a braided leather show collar, a nylon Martingale and a braided nylon slip leash-collar combo. But the Fursaver is by far one of my favorites. Maybe because it was the first REAL collar I ever bought, back at the Sieger Show in 2008.