If you can get up to Cashmoor tomorrow I can take the Acro home and see what the problem is Lee. Then I give you a rundown on the situation so you will know if there is ever another model with the similar issue.
Lee, if you reversed the servo, you must re-bind the receiver's fail safe, otherwise you'll have the engine going to full throttle if you have a radio problem.
I'll probably be up on Saturday Lee, so I can take the "thing" home or at least give me the engine. I can set up the latter on my test bed and sort it.
Trying to do indoor jobs as much as possible due to the cold weather.......