There was a post a while back concerning the use of the sled pro tool on the zx chassis. It was brought up that a spacer is needed to properly use the tool with RER. Have emailed sled pro to send me the spacer, and they replied that they would. In the mean time, I was wondering if someone had the measurement for that thickness, and is that from the tool to the spacers Doo has on the shaft to begin with. Looked at my belt last night, Center to center is fine with tool but offset is unknown, and pulled a serious piece of cord of the side of the belt. Thanks in advance.