Wow thanks for all the replies everybody!
I remade the powerpod and mounted it with the firewall in line with the front of the plane, then I taped a coin to the end of the battery for a little nose weight. It flew much nicer this time, stable in pitch and none of the wing wobble that seems to have spoiled other peoples experiences.
Unfortunately it required a lot of right rudder to fly straight, I think this was because my foam board was badly warped giving me giving warped wings, after a nice little flight this got the better of me and as I came back towards myself I ran out of talent and stuffed it into the ground breaking those ohh so fragile wing struts.
I cut the top wing off and I'm going to remake it with the warp going the other way and see if this cancels out the warp in the lower wing. But until then thanks for all the kind responses.
My even sadder looking SE5
One badly warped wing