For me no, others (not many though) have said yes.
The discussion was that the 3 gear had more power on steering but that can be dialled with setup. The 4 gear give more drive, more off power steering (armature inertia works for you into a corner), better balance and MUCH faster throttle reactions in the air.
The 3 gear also didn't have perfect diff to idler spacing and was open at the bottom both of which meant the gears wore out relativly quickly where as the 4 gear ones last, well like a B4 i.e. the ones in mine have been in for nearly a year now.
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Nortech is ACE!
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