1/2” is the gateway drug.
I too have the 1/2” TT BL kit. I think I’ve maximized my tire size at 35x11.5, +31 offset (they also fit at +44 but looked funny). They tuck now but any wider and/or more offset would put my tires into the fenders.
Most guys who want 35’s will want a full fat 12.5”/315 tire and a 1” BL makes a lot more sense for that.
Did you have to do anything more than the pinch welds and a 1/2" body lift to fit those 35s?