Thanks so much for your input. I did not make any changes to the plans of the plane. I build the rubber band, high dihedral begginer wing. I took the plane yesterday to a hobby shop and while making a few purchases, i mentioned it to the owner. He said bring it in, so I did. He said the stab looked fine, didn't see anything wrong with the thrust. He said maybe a gust of wind took it upo like that. Anyway, I'm going to the field tomorrow am (batteries charging now!) for a second-third opinion
Greg