Mine (on my TSA 102) needed a bit of tweaking, and does the job nicely now. They are easy to adjust.
However, I sent the first one back because it was a bit "gritty" as you turned it- even with clutch adjustments. Seemed to be a manufacturing fault. Claude was happy to replace.
Don't know how they compare with the Feathertouch. The Feathertouch looks nicer though: the MEF-3 is obviously an "add-on" with that little plate underneath.
In retrospect I would have been tempted to pay the extra for the Feathertouch.
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