Thanks for the plug!

In regards to the Mcmaster Carr o-rings, I did get some (in both materials) but haven't had a chance to try them. I'll be rebuilding this weekend and I'll throw those in there. From other conversations I have seen around them, they may cause a little friction if 2 are used, however I can't confirm that.

Also interesting note, I received a Slash 4x4 on trade and I took one of the shocks apart, and it had blue groved o-rings in it. Not sure the sizes but that maybe an option as well.