Set 20 bearings don't last long for me...

[dontlifttoshift]

So here it is, it's not the bearing's fault, it's a 20x10 wheel with a 3 1/2" backspace running a 295-45/20. That's a 30.5" tall tire on a wheel with no backspace......I can really only run maybe another inch of backspace for a total of 4.5, I don't think that is going to save my bearings. I am seriously contemplating a floating axle setup but am concerned that my (lack of) backspace and very large overall diameter will still cause me problems.

When I put them together they are tight and I am running the thick currie retainer plate with another ushaped plate against it. I bent the retainers last year so I doubled them up. After an autocross event I have .015" to .025" of endplay, to me that's not acceptable. With that endplay the car drives fine and they don't howl, and on disassembly they look fine. i thought the wedding band was walking on me but I tried pressing back tight (I was going to tack it in place) they didn't budge, so I don't think they moved.

Looking for help or input on how to make this as bulletproof as I can as I do drive (and autocross) the car a lot and I am sick of changing axle bearings. I am on my second set in a month and am pretty sure they will be sloppy by the time I am done at the KC goodguys show.

Soooo, any opinions are welcome.

Thanks
Donny