I run the hitech 645mg servos in my mt2.. I switched to the airtronics mx3 radio that cen offered as an upgrade... their stock radio is either the impact or skyon am.. I believe they are made by airtronics as well.. (I could be wrong)... I had to modify..(shave) off the ends of the plugs to fit... otherwise... direct replacement... futaba and hitech should fit as well...