I couldn't wait for the 5 ID X 2 mm cross O rings to come in so I found O rings at the hardware store that had imperial measurements that were close enough and reassembled the front shocks with the 5 mm shafts I made and the valves for the shock pistons. I also got some M4 screws to replace the hinge pins. I went with the 60 mm long ones and the shoulder was just right. I just had to cut the excess threads since the shoulders were so smooth I didn't feel the need to polish them. only the front suspension is done for now. I bashed it on 6S and it all worked very well. The 5 mm shafts held up but more testing needs to be done. The wrong sized O rings didn't leak but I suspect they might because they didn't fit as tight as they should around the shafts. The shock straps worked great, more testing needed on those two. The hinge screws worked awesome and let the suspension move very freely. The piston valves really seem to give more damping on hard landings. I noticed a lot less bottoming out. The over stuffed Proline Mashers are excellent for bashing, they give good grip on many surfaces and the over stuffing firms them up quite nicely giving a lot of support for this heavy truck. I'm very pleased.