Yes, is easy to modify and have enough space, you must to make a hole and a small compartment for the tuned pipe, wait to see the pictures.

The YS110 is a great engine and I think that is not too heavy, just a little more than OS91FX.
I think that YS110 is good for 3D flight and the OS91FX for IMAC. Marcelo recommended me anyone of these two engine...
HernĂ¡n.[8D]