Thanx Fletch, I finally figured it out lol. Now my next question is, The engine mount & firewall. I'm used to buying planes that already have the engine mount holes installed so all I have to do is screw in the engine mount to the firewall. With this plane I have to drill the hole to the firewall to install the engine mount. I want to mount the saito 100 to this plane inverted but what would be the right way to install the engine mount so it gets the right thrust, Please if you can provide pictures and tell exactly cause I have never done this before, Thanks.