Oh, so thats what the decalage is.

So if my wing was not perfectly true from leading edge through to trailing edge and had a bit of negative incidence that would require more up elevator, but wouldn't that also mean inverted flight would need less down to fly level. It require slightly more down whilst inverted but not heaps more.

The strange thing is that the amount of elevator throw was quite conservative for a fun fly, with the power on it would still loop nice n tight but if dropped altitude fast without power to line up for an approach I only just had enough to pull the nose up (scary). Then I would power up a little holding the nose up with the elevator and come accross the field for a 3 pointer harrier style landing then it would go all sensitive on me and start porpoising coming on to the strip.

Sorry if my questioning is long.

I hear what you are saying about the cg I will try going further back next flight but I would like to see if there is other possible causes while I'm here.