I also say that it should not climb under power. Adjust the thrust line so that once trimmed out at medium speed, any increase in power simply increases speed. You need to put washers under the top two bolts between the firewall and motor mount to make the engine point more downward. Nothing is more disturbing to me than to have to readjust the trim every time you readjust the throttle, no reason to have a plane so out of trim that you have to constantly change elevator trim with throttle change.