The air brake was a pain in the rear,,, there should be a servo mounting plate in your hardware bag,,,,, there was no instructions in mine ether,, i just played around and made it work,, im sure its not right but it works,, i had to add some extra hard wood to the mount to get it to mount to the inside of the fuse. The air brake doe's look cool but then again,, up close it is kind of cheesy, i think it should of been deleted on the production models,, or made better,,, i had bad weather again today, rain, and wind,,, i am starting to get sick of this crap,,,,, it is ether raining or it is to windy,,, i want to take the SU27 back up and really ring her out, and get some video,,, maybe Monday,.