I just started building a SIG 1/5 scale J3 Cub kit, the instructions tell you to install the motor mounts to the firewall then install the motor on the mounts,I am using a Magnum XL 52 4 stroke mounted on its side. After installing the motor the correct distance from the firewall, the throttle arm is only 1/4" away from the firewall at full throttle and 3/4" away when fully closed. SIG supplies a flexible steel cable and a nylon tube for the cable to go through. I don't think there is enough room to use this type of set up. What would be the best way to set this up? any help would be appreciated