So I flew my glow Mini Funtana a few days ago and I noticed something unusual. It has a slight climb below 1/2 throttle and descends at higher throttle. I am under the impression that in general terms more speed generates more lift. It's slightly nose heavy. But I'm thinking I have too much down thrust at the firewall. I was only able to estimate the angles I used when I did the conversion.

Am I on the right track?