it is a bit tight
i fitted captive nuts to the cowl ring, and made up a long ball end allen key to get the cowl done, used M4 cap head screws, works a treat, and took little time, and, i have a tool for future projects!! but dont do like i did, i spent an age getting it all right, teh glued the damned thing in the wring way round!!!!
mine, by the way, is having 645hi-tecs on the elevator, rudder, and flaps, and standard futaba 3001s on the ailerons, PLENTY power
gear will have a mini metal geared, throttle will have a 3001