I have been setting up my Inspire 90 with an OS120ax running a tuned pipe and a perry pump. It has been progressing well so far, but involved a sizeable modification to the fuselage to house the semi recessed tuned pipe. I measured the CofG the other night and it came out just 2-3mm behind the forward limit. The to do list is getting smaller, but its still a little way from its first flight. I'm looking forward to flying it as it looks like a great aircraft.