If you order the front Neu brake spacer to the place of the front cover, you don't have to use spacer to hold bearing in place, because the front Neu brake spacer is 6mm thick (and the frontplate is only 4mm) so you can mill it to 5mm and you keep a lips to keep the bearing in place.
Good idea, if i keep my brushless, i'll do it with my front Neu brake spacer