Prop guard for 2204 with 5" prop

Works for my Eachine Racer 250. Remix of universal 250 class quad prop guards
by NIelsHeemstra, published Oct 29, 2015

I basically loaded his model up for the 2206 and rolled back the extension for the 6" blades back to the 5". I also added 3mm fillets to the corners to reduce stress concentrations and strengthen them.

Seemed a little tight until I screwed the motors in and it pressed them into the guard.

Have not flight tested it yet. A little worried I will now break arms instead of