I'm no expert... but I have found that an easy landing plane is one with a very low wing loading... So going light is key. I haven’t found that engine placement is as critical as getting the CG where you want it. All things being equal... The longer the moment (engine and tail) the more pitch stable it will be, and the shorter the moment, the more unstable it will be... which is desirable with a funFly!!!

One other thing... If you get the CG too far back, the plane will be very pitch sensitive and be difficult to land... ask me how I know

Post some pic's of your plane...