Some forum horror stories and the fact that the moco uses them on its 103 convinced me to add compression releases when I installed the SE103 kit with 255s. If the cams aren't 255s the CRs might not be necessary.
No problems so far, but mine has compression release standard and outside temperatures have not been above 60 here yet.
I have 10 limited and thought it had the compression release as standard but when I took it to HD for banging on startup they said the limited did not come with it. So now I don't know what I have. Anybody know for sure?