On a whim I picked up some 90A Thunder bushings (the clear gold ones) to throw in my 44s (coupled with riptide cups) and I'm blown away how good they feel, especially not being fan of thunder bushings IN thunder trucks as they always feel too tight stock and I can't loosen them enough without the nut falling off.
The thunder bottom bushing is the same height as stock ACE bottoms which is pretty tall to begin with. Top is much shorter so with the krux pin = lots of clearance.
Prior, I was using bones meds/riptides and it just felt off somehow, like they would tip into the turn vs flow into it, but they were more responsive this way than using the Mini logo bushings; and I doubt the 1-2 mm height difference in bottom bushings would affect geo that much, let alone the 2 duro difference betwixt the bones (91) and thunders (90).
Felt broken in from the start given how turny the truck are, super smooth and not squirrley or tippy feeling. Worth a shot if you have them kicking around.