I checked my log book; I installed the LSA version of the T-3 in March of 2020, on the 780 lb. S-7S, and now have right at 190 hrs. on it now, with just 9 pavement landings, the rest off airport, plus the ski ops. I checked it last night after reading this post, it's tight as a drum, no slop whatsoever, though I did take up about a quarter to half a turn on the AN5 nuts, to achieve what felt like "just right" torque.
9 hrs. after the install, I was trolling a 8400' ridge I have landed a half dozen times in the last few years, though each time the rocks seem to be re-arranged from my last visit just a bit. The end result being on one of my passes as I was finding a clear/clearer path for touchdown, and while flying upslope, I got into a situation where I smacked a rock with the mains off the ground but the tail low, while ALMOST having enough climb to clear it. It wasn't a vertical force, but a big sideways (straight back) hit. It bent the main AN7 bolt, blew the tire, broke the wheel, and trashed the 8" Matco tailwheel enough to make it cheaper to just buy a new one, which I immediately did as I have gotten good service out of them in the past, this was a out of the ordinary event. I thought at the time that I may have done airframe damage, it was a BIG hit, and I did tweak the bushing the AN 7 bolt goes through, and the bent bolt is still in there as to get it out will probably require a skinny wheel grinder. I did effect a "temporary" fix, that upon further reflection was deemed good enough to serve as a safe repair until I run out of other projects.
Point being, the T-3 survived this event unscathed, in addition to the other 181 hrs. afterwards. I'm not saying it's bulletproof, but after carefully reading all the posts on the subject here, I have no plans to change it. In my previous S-7 time, I broke 2 of the original RANS single leaf springs, and then went to a 3 leaf J-3 spring, breaking one leaf of it twice, before deciding to pre-emptively replace them at 1000 hrs., as the breakage seemed to occur at a bit less than that time. I can see how it MAY have a bit less tolerance in a sideload situation, but am willing to pay that price for the super cush action it provides. My big takeaway from this thread is the stated lube issue, I guess I will take that into consideration, certainly can't hurt, also the checking of the torque on the side plate nuts.