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Mine went together ok with the 8mm using saga gears and a scorched Pinocchio spool. Did you try rearranging your spool spacers? My bad.. I just reread your post saying you were going to rearrange the spacers. Just trying to helpThe only thing I wish is that the 1721 had a longer motor shaft. If they're gonna go 8mm diameter might as well go the same length as the other 8mm motor shafts. My pinion grub screw is pretty close to the edge. I may swap around some of the spool spacers to see if I can make me feel better about running this thing.
Aren't the other 17** series 5mm diameter motor shaft? I feel like they should have went longer if they were going to go ahead and put a 8mm diameter shaft in. I bet it's probably something with the balancing of the motor. Just a guess, though.
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