OK, I've got to stop being so hasty in putting up posts here
Looking through the parameters, we quickly found, M/C User Para> ATC> Heavy, listing EC and EZ percentages.
Strangely they were both set at 100!
EC is now 70 (arm rotation speed)
EZ is now 30 (positioning speed)
Everyone's happy now.
But why does the machine have these values at 100 by default?
Also noticed that the large dia tool description also used the new speeds.