Gaurav,

You will generally get answers based on personal preferences. I am no different. I prefer gassers. I think this kit is ideal for a 40cc gasser. Mine needed the nose weight of a magneto ignited Quadra 42. Others have needed less weight. That size is just about right for power. Much more and you will have problems with prop strikes (18" is just about maximum diameter). Much less and it isn't as much fun.

Enjoy,

Bedford