My current plans are to install a Brison 2.4 in the plane since it will not require cutting into the firewall to install. If that proves insufficient for 3D I have a ZDZ 50 waiting in the wings but my Brison is a very stout engine. It swings a 21X8 Mejzlick very well. Mine will be here tomorrow & I will start on it next week. I can't remember if I ordered the hardware kit or not. I have a small hobby shop worth of the gear in the workshop so I doubt if I did but you never know........