Strobe doesn't fit under gearcover?

[Rtsbasic]

I finished installing my Strobe slipper onto my Emaxx this evening, however I noticed the gear cover won't fit over it - its making contact with the spur gear. Is this normal, or have I put the spur on the wrong side of the strobe? I think its assembled right.

Also, why do some people take the grease out the bearing in the strobe?

Cheers.