Total cord length=490mm.

Therefore 30% is 147mm.

I have now spoken to Ali, He remember the SM kit balencing on the front edge of the gear doors, which is approx 125mm. However he's not sure what the difference with the extra nose length would cause to the CoG.

Thanks for clearing that up. Are there any instructions for this model ie movements required to fly it??

I shall try to move the CoG back to 160mm

Seems more info is required when this kit is sold though.

Steve