||This gear is complete garbage. Due to the sintered material used, it cannot stand up to the required stresses for a dual sector gearbox. Modify also ignored the patents of Siegetek Concepts on such a design. If you want to go Dual Sector gear, it's Siegetek Concepts or NOTHING.
Modify - Weak, sintered design, made in Asia
Siegetek - Robust, CNC machined chromemoly steel material that is hardened and can withstand anything that you can possibly throw at it, MADE IN USA
One last thought - These are for advanced technicians only, if you are afraid to take machine tools to your gearbox components, forget about it.
My results with the dual sector system:
Siegetek Revolution 14.09:1 dual sector gear set
Modified SHS 15 tooth piston
JG m93 motor
Siegetek concepts spring guide spacer and special DSG spring
11.1v 40c 2650 mah LiPo
350 fps, 62 bb/s
Rating: [1 of 5 Stars!]