This also could happen with the one-piece pin carrier holder. The reason therefore is the suspension pin design or the pin carrier design. It's easier to change the suspension pin design for sure. Once you ran a 1mm shim or thicker in the rear rear with no shim in the rear front and you tightened the carrier screws, those screws bend every time because of the alu sleeve inside the carrier don't allow any flex of the holder (which would be a bad thing in another way). If you further use these same screws (no matter if low or high rear toe from then on) you will end up in altering settings regarding on (anti) squat and toe (in). This is because you never stop the screw at the very same position as it once was seated. The solution is to look around and ask if someone could make (or make them on your own) suspension pins designed like these:
http://www.redrc.net/wp-content/uploads ... aOpt-2.jpgI contacted Martin because of this but still waiting for an answer. No problem ...
So long you have to use new screws EVERYTIME you disassembled your pin holders. The bent screws also are the main reason for a stuck or non-smooth suspension traveling in case that issue appears the one or the other time.
I have made them and now it performs with precision.