The Paradox is, to me, an entirely different headphone than the stock T50RP and the other mods I've tried. Not sure what kind of forbidden magicks LFF used to conjure up that kind of sound, but it's a profound change. As someone who approaches this hobby from a collector's mindset, owning some 200+ pairs of headphones and earphones, I try to keep my perspective on things baseline: I can acknowledge when a pair of headphones I like isn't necessarily a good pair of headphones, and I try to refrain from hyperbole and needlessly hyping things.
If someone told me the Paradox was an $1200 headphone, I wouldn't bat an eyelash. Not sure if that says more about the Paradox or the current state of the headphone industry, but there you go.
The other T50RP mods I've heard were good, but not impressive to me. I honestly don't hear what the fuss is about with the various clay mass loaded, filled cup, and felt based mods. All these mods, despite offering different flavors, have similarities to my ears. They all use the same underlying approaches. I'm guessing that whatever LFF did is fundamentally different in key respects from all the other approaches "discovered" thus far, and is ahead of the curve compared to the rest of the mods. I'm not knocking those other efforts---many of them are better than anything I came up with modding my own T50RP. However to my ears they (including my own) don't come close to the Paradox. Of course, that is also dependent on what one is looking for. If you don't want something ruler-flat, then it's not going to be for you.
I can also fully understand the reluctance to buy them blindly. If the chance to give them an audition comes up however, I whole heartedly encourage people give it a try and hear for themselves.
Thanks for the information and maybe I will even get to try it in a meet (never went to one before), should be fun