Gasp horror! Thats a first for dad to get it wrong! So ive got four degrees on it now![X(]
I hope the extra upthrust will be alright. I noticed that in upright walls you really had to hang on the elevator even when it reached vertical, whereas with inverted it does goes to a dead stop with a stab of elevator. Maybe the cartwheel put in a bit of down thrust into the firewall.