Mike:

Just got my off - piece of cake, Made a spanner type bar from 3mm ali, 50mm wide with 11mm slot to clear prop shaft and drilled 4 holes to secure to drive washer with 16mm long cap hd screws, un-did shaft then carried undo-ing until drive washer poped of easy.

Just deciding whether to go ahead and move the magnet - large soldering might be a good Idea, should not need to much heat because the magnets are only about 3mm deep/long