Right, all sorted! [8D]
Had a good read through loads of similar posts, and I'd set mine up wrongly.
All I should have done in the first place was replace the servos, then once I'd seen they were reversed, all I needed to do was flip the switches on my Tx, No. 6 and 7, but instead I had flipped them all until it looked like it was working correctly, trying to save time not reading the manual ............. but those 5 minutes cost me my 10 hours of work on the canopy! [

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Thanks for the help!