The metal gears are stronger, especially when dealing with shock loads. But the nylon gears have less slop and stay tight longer. It's the only servo I've had fail on 5 cells - an older servo. If you are contesting with a skeg you may want the MG version. YMMV KC
-----Original Message----- From: Steve Gibson [mailto:[EMAIL PROTECTED] Sent: Thursday, December 06, 2007 5:36 PM To: RCSoaring Exchange Subject: [RCSE] Which JR 3421- Metal or nylon gear ? Which JR 3421 should I use on flaps and elevator for a Pike Perfect, the metal (DS 3421) or nylon gear (DS 3421 SA)
