Hi Stephen,

Basically I set it up with the Cof G right at the very back of the recommended range but for my test flights I didn't have my spinner on which put the CofG even further back. It was certainly flyable and wasn't a handful at all - I just prefer my models a little more locked in - have now set it 95mm back from the wing tip LE - will see how this goes.

The regular CofG test is simply to roll inverted. If the model pulls to the ground then your CofG needs to go back, if it climbs then CofG to go forward, if it flies level then you're pretty much at the back limit but most like to hold a little 'down' when inverted so CofG should come forward a little.

The 8411 will be fine on the rudder. I'm with you on the over servoing! I now seem to have got into the habit of only ever buying 8511s - expensive? sure, but I know I'll always have a servo for whatever I need! As with you, these servos have have proven themselves in my jets too.

Rgds,
Mark

PS Just to remind you - make sure everything is securely held down in your model. These 50cc singles really shake the airframes. Don't rely on self adhesive clips/clamps to hold anything more than cables in place. Anything heavier, either epoxy the clamps in place or epoxy a balsa plate or similar in place to which you can securely tie wrap items.