Anybody know any fool proof ways for checking up / down thrustline, one of my planes I just can't get it hands off inverted and keep moving the battery / CoG further and further back and it's now way behind the manufacturers recommended yet in comparison to my other planes still needs a shed load of down elevator to keep level light.

Any help much appreciated !!!!!

From your glorious country: http://www.gbrcaa.org/acrobatfiles/Trim.pdf Hope its of great help ... the site contains a lot of stuff. I love it ...

Brilliant !!!! Thanks for that, much appreciated, lots of useful info on there for both now and the future !!!!!!!

That trimming info is great! Maybe one day I will be able to fly without my plane trying to head to the ground every 5 seconds!

I am still very much a RC hobbyist only, not that serious but am learning that some proper trimming can make flying a real pleasure.