I have the 12A in mine, and I have never needed "full travel" in any loading configuration. With heavy rear PAX loading and low fuel (worst case scenareo) I will have about 3/8"- 1/2" tab up..and will go alot farther. Solo landing will need maybe 1/4" tab down..and it will go alot farther than that to full travel. Also, the 12A without a speed reduction unit is very sensitive,and fine tuning in cruise requires just a tap of the button. I would think if the 10A is slower, that may be an advantage. I think my aileron trim uses the 10A, as it is a bit slower. I dont know if I am much help, just letting you know how mine works. I also have the electric flaps on the MAC stick, and I love not having to reach for anything...stick and throttle is it. I installed the trim position indicators, but if I was building again, I would probably leave them out. Its easy enough to "see" all the tabs/flaps just looking out.