Looking back I am regretting getting 14:1 DSG gears, If I had to do it all over again I would go 20:1 DSG gears. I plan on building another, or after I get my current one perfect. I built a MP5K and fell in love with it the last month or so. I'm back to the DSG, which works okay I suppose. I have a 28TPA motor with SP150, I'm at about 325 on .25s bbs. Motor gets pretty warm and feel a little sluggish, trigger response is not the best either. 14:1 just has such little torque paired with such a tough spring. I've had a couple configurations with different parts trying to find the best mesh of parts. I feel as if it is close. Question is, could I drop to Guarder SP140 spring? I have room in the FPS, just wondering about PME I guess. Dropping the spring would help cycle time, RPS, amp draw..... I'm using a 18k motor, so not a super fast motor. Don't really care about RPS much, just efficiency.