I need to replace the brushes on my Makita orbital sander. I have no problem taking the thing apart and seeing them, but does anyone have any tips on getting them in correctly? I just replaced the switch that was broken and I think I messed up the brushes trying to get them out of the way to put the sander back together, because it goes on now but just hums without spinning. It's old enough that they probably needed to be replaced anyway, but it seems a rather delicate operation, and I would like to not mess them up again trying to get them in.

Thanks for any advice.