I'm using a 22k 22TPA motor on 12:1 SS 3 teeth with Gate Titan. I only use Semi-Auto and build around trigger response. I have a second gun with 13:1 SS 3 teeth with gate titan. The motor specs in that gun is unknown. Its a Dytac stock motor. It's very similar to the 22TPA motor I have I swapped them around in guns and the Dytac motor is about 2ms slower on trigger response and very close maybe 1 RPS faster. The 13:1/Dytac has about 50ms TR. The 12:1/22TPA 22k has 34ms TR. I also tried a Stock VFC Avalon motor and it sounds like a wounded cat when used. Horrible motor. I spent hours messing with it. Don't know why it sounds so bad. I want to replace the Dytac motor, and use as a back up or in another gun later. Was thinking about getting the same motor. 22TPA one. Saw a 28TPA 18K motor. Would there be any advantage to the 28TPA motor? I know it would be slower RPS, but I'm not concerned about RPS. Would the TR be better, If so would it be noticeable from the 22TPA motor? Would it run cooler? I'm only pulling an M120. Was also thinking about getting the EMG/RetroArms gear box shell for a DSG build. Would it be suitable for that with an m160/170?