I recommend the MTR240's, however I think they have been discontinued and have now been replaced by the MTR299 motors
Only to the public. 240 motors are still available to the trade. We won't use 299 ones.
New motor from M-Vacs arrived today: it's the MTR283. Thanks, M-Vacs.
Was it the cheapest one?
It was £21.99.
I've eventually managed to put it all back together again - it seemed to be much harder than the last time I did it 20 months ago. I had managed to get the motor out without removing the wheels but I couldn't reassemble without taking the switch side wheel off. I couldn't remember how I'd removed the wheels before. This time I looped a piece of wire round the tabs projecting inside the casing, then twisted the ends with a pair of pliers thus pulling the four tabs in just enough to release the wheel.
I couldn't get the other wheel off (cable side) so I tried to reassemble with just one wheel off. Eventually I managed it, but it took an awful lot of jiggling etc.
Now I'm just waiting for the filter to dry before doing some
oops - I mean Dysoning! (And, yes, I did power it up in a dismantled state to check the electrical side works.)