I've never done it, I've also never heard of anyone doing it either. I will play around with it and see what your up against.
Hi Guys,
my name is Reiner, I am based in Germany, I am also using a DC 411, to rotate the gearbox you have to unscrew the gearbox with the 4 gearbox screws, than lift the gearbox incl. the beafle fan, part no. 9 in the service drawing, here is the retainer, part no. 10 in the service drawing located just a little than you can rotate the gearbox in steps of 90°. I hope this information helps.
Hopefully I have not to many spelling mistakes
Greatings from good old Germany
Reiner