Hey yetti if you got the sonic low wing i advise to not use the riser block on the ailerion servo, i did and i had the remount my throttle servo so it didn't hit it. The low wing flies quite nicely, i've only had it up 3 times before the snow came this year. And to answer the question, yes glue it on, your rudder will thank you, it looks tricky to glue on but i used a couple of small pcs of small linkage rod to help, i drilled in the pc and inserted the rods, then lined it up on the fuse to mark the holes, then drilled in the fuse and then epoxied it in place.