this is what i was crying about a million threads ago the plane is designed for an under powered saito 100 if you start spreading the motor mount and cutting into the firewall on a high vibration engine like the saito 150 you are going to tear the thing apart .at least with the funtana 90 you can find a way to work around and put a bigger motor in .i have to say this engine thing has taken all the fun out of this plane and i hate it now ! I give up i just am going to dump this piece of crap!