Moskito 70 prop guard

Primary reason for this is to more easily remove the prop guard. I fly indoors and outdoors... indoors(house), I like the protection, but outdoors, ditching the guard adds a bit of performance (I think ;) ).

This is a remake of jjd64's removable prop guard. Had problems printing his, since the extensions that link the frame to the guard were not strong enough, and the joining was to fragile.

This remake adjusted that. In my opinion it now prints as strong as it can with the size limits.