The plane looks really good! Glad it flies nice.

I had/have a similar issue with the Venus 40. I was running a .46 engine with a 12x5 prop, and it simply ran out of vertical even when flying wide open into the pull (tached on the ground at 12,000). I switched to a .55 engine so I could turn a higher pitched prop. Going to try a 12x7-8.

Good luck and keep us posted.