Ha! Finished at last:
I fitted a Graupner Speed 400 motor into the beast, and an Mtronics RV ECO 20 ESC.
The Futaba
S3002 Servo packs real punch and gives the MQ fantastic steering response.
Took it for a blast in the snow.
w00t! She flies I tell you, she flies!
Hopefully if the snow builds up a little, I'll get some decent photos of it in action