Actually it didnt rotate very fast, untill it burnt out, compared to the lynx, this rotor was heavier, and it was the epoxy blob that got pushed down too far that created too much resistance, going to be looking at another slightly larger motor, but will have to do some surgery to get access to the wires.
Cut out the plastic bridge that the motors glued to, then try to unsolder the old motor, swapping one lead before disconnecting the other, so I dont loose them as they may retract before I can reconnect them, means putting flying leads on the replacement.
If I can get it to work it will be impressive, and I still have a Seaking to build and to find the others, I know I have an old (Nappy) toy box full of unbuilt kits, including 3 Matchbox sea harriers.