In the shop:
I almost never give anything five stars. Although I am very impressed by this product. Very well built very solid, not enough "O's" in smooth to describe the motion of the gears. Dropped right into the TM V2 mechbox, and everything stays in place while wrestling with the spring and closing the box. No shiming, no worries about gear alignment. Package includes new bushing and anti-reversal latch, and everything is a perfect fit.
In the field:
The high torque gears handle the M120 spring without breaking a sweat. Also reduced the ROF to a very nice place. Enough BB's per burst to lay some fire, yet easy on the magazine, less mag changes.
There is little doubt this product will be in my other two TM's before 2010 is over.
Ease of install
Keep in mind this model is only for TM mechboxes.
Rating: [5 of 5 Stars!]