Just some info: I've been trying the TRX2362 x-rings, which seem to work very well so far. I've used the AE shock shaft guide mod, together with the 2 small clear spacers and the tall white spacer in the TRX package instead of the yokomo spacers. The TRX x-rings are tighter around the shock shaft than the original o-rings (or the AE rings which I've also tried), so they need almost no pressure on them from the spacers (the AE shock guide also adds about 0,8mm of spacing btw).
There's almost no friction in the shock like this, no leaking and no rebound building up.
http://www.trxxs-winkel.nl/trx2362-s...rs-p-1811.html