I didnt like the orings at all. they may work fine for some, but I didnt like them. So, I took them out and ran naked, lol. And it worked fine. But I was still having to rebleed my shocks every race day, so I picked up the losi brash washers. And even though leaking was minimal, I mean like 1 drop per race day. I still have to top them off and rebleed every race day. But, here is the kicker. For 2 months, I topped them off and rebleed weekly (as often as I race). Then, I decided I should probably change the oil. Well the oil came out clear. So I was like, wtf, I lose a tiny bit of oul, but dirt never seems to make its way into the shock. My 22 on the other hand is DARK brown after 1-2 packs. Why? no clue, i tried several different orings and it was the same. In short. The brass washers didnt do anything but make me feel better, lol. They are cheap and definitely wont make anything worse. And I really like these shocks. These and the Kyosho shocks really seem to keep the contaminants out.
BTW, I thought you ran a K buggy. I sold my K Buggy because I was poor, but the car was great.