Drilled, prepared and riveted the flap actuator channel, riveted on the appropriate angles as per Van's instructions, screwed it to the fuslage ready to mount the motor. Drilled the backrest channel and mounted the motor, took a bit of assembly and disassembly to get everything nice, hooked up a battery and it ran sweet. Doesn't take long for it to travel up and down. OK dismantled the parts for the flap assembly and primed them. Finished ready to mount.