Tried this leveling system from Rubi this weekend. I chose this system because they offer a 1/16 wide spacer strap for a tight joint.
The system worked decent going over a perfectly flat wall framed with Timber-strand 2x4s
What this system is good for is making a 95% flat tile job a 100%. It fine tunes it.
I used these over a uneven concrete floor and the straps just broke when tightened, as they are too weak to pull lippage out of tiles that are set less than 95%.
Even at 1/16”, the straps are too big for a rectified tile in my opinion. I installed a floor today with 12x24 tiles and ran with a 1/32” joint for a crisp look.
Over all, I would not use this system again as I believe there are stronger systems out there that work better.
On the bright ☀️ side, this 12x24 tile from @ with the pattern turned out sharp!!!