Getting back on topic, my HL Abrams(wish it was a Tamiya) has an IBU3 in it, and the IBU3 has full control over all the servo settings so you can set the recoil speed any way you like. If I can't wait for the Tamiya RC Abrams, I will get the Tamiya static model and put an IBU3 in it. I want the RC version much more than I want to kitbash the static model.