The brushes on my WFL 2260 look as if they’re on the way out. I see from other posts that there are two motors fitted to this model. Is there a way of telling which is which without taking the motor off? I don’t want to strip it until I have to as the machine is still working. I’ve lookd around with a mirror and can see some dot printer numbers, but no names. Does the shape of the brush holders give a clue; could the local supplier tell from the Bosch database if I give them the FD number (8011 600148)?