Part of the reason I went with wigsplitter was Trail Worthy was confusing "custom PVC". I don't need custom, standard rim, standard tires..
As for fit, with the standard 12 bolt rims, and Wrangler MT -- the wigsplitter are 'tight' but not unreasonable. There is no way that bead is going to move.. It is tough to bolt the wheel halves together, but it takes less then 85 ft-lbs, as long as you do a little bit... over and over and over and over and over and over tightening down the outer rim half.
One huge advantage to this (over not having the inner beadlock), airing this up was
SIMPLE. The bead was already against the rim (tightly) and just putting in air it instantly started to fill.. no leaks.
It's a lot of work (without air tools turning the nuts) but so far, it all seems reasonable. (and it's one hell of an arm workout!)
Takes me about 20 minutes to unbolt the old tire, 10 minutes to break the bead and separate it. Then I clean/repaint as necessary. Reassembly, put the inner rim on a bucket.. set the tire on the rim, add the o-ring and a small bit of tire slime as a lubricant on the o-ring... then set the outer wheel and start bolting it down with standard grade 8 washer/nut torqing to 85 then 125 ft-lbs... that takes about an hour for me. Then air it up, verify it holds air. Let ALL of the air out, and replace the standard washer/nuts with the correct NEW wheel nuts, one at a time.. again torquing to 85 ft-lbs until all of them are replaced, then go around and up to to 125 ft-lbs. That takes about another 30-45 minutes... inflate it ONE more time and verify holding air.. then ready to install it.. All in all about 2 to 2 1/2 hours including the wheel change on the HMMWV. (I suspect air tool would cut this in half.)