From their web site.

The Zenoah GT80 is a great choice for more performance minded modelers. In fact, the firewall is set up for this engine, and the instructions show its installation. Swinging a 24x10 Mejlik or Bolly gives enough thrust to comfortably hover at about ¾ throttle. The GT80 twin is smooth with minimal vibration, plus its self-contained ignition means low maintenance and no ignition batteries to charge! For IMAC competitors, this is a great combination for the sportsman, intermediate and even advanced flyers. One of our early production models had a GT80, and the Sukhoi balanced properly by moving the receiver battery forward with no added weight.


Keeping that in mind I dont have to be concerned with engine weight. However, possibly with enough carbon fiber I can offset some of the tail weight.

I will not be ordering engine for a few months. Maybe I will just wait and see what this new BME Extreme looks like. If it ever arrives.