[FrisbeeFunTime]

You may want to look at the Amt103-v or possible another variant of it if you want to put it directly on the cim. We got some from first choice and they seem pretty decent. The encoder comes with various adaptors for different shaft diameters including an 8mm which should work on the cim. I haven't tested them yet so I don't know how good they are, surely someone on here has used them and will be able to give some testimony on how well they work.