Upgrades from Mk2: M3 Faceplates come standard. No need to buy them separately Features: 66g weight 4x19mm M3 face mount hole pattern 2s-6s rated voltage 24mm, 27:1 all metal planetary gearbox Custom "D" Shaft pinion gears eliminate pinion slip! Custom wound 2006 brushless motor directly integrated into the gearbox 6mm "D" extra long output shaft (cut to the length that you need to save weight) Custom billet 4130 final planet carrier and output shaft Output shaft c-clip has been changed to minimize the groove and provide the strongest product. Faceplate comes with flats built in to facilitate clamp mounting. Motor is integrated into the gearbox to minimize footprint. Performance 12V input (3S) 863rpm free speed 14.8V input (4S) 1151rpm 22.2v input (6S) 1726rpm CAD model https://grabcad.com/library/repeat-drive-max-1 Re-greasing is recommended for high voltage usage and improved performance. Replacing the grease with a thinner grease or oil will reduce load and heating.