My first quad racer build:
Defy DR250 Frame: https://www.defy.net/xcart/carvon-fiber-dr250.html
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Looks like a nice frame. I wonder how it compares to the Lumenier QAV250. BTW, sorry the part labeling is a little wonky right now. If you edit your build and tag your parts they'll save properly.
I have not yet had a chance to do a hands on comparison to the QAV250 frame. However, one reason I chose this frame over it was I wanted arms that were separate from the frame. As this is my first quad racer I expected to break the arms a few times. Thus replacing a couple of sheered screws seemed a better idea than replacing a full frame. As a side note this frame is derived from an untested prototypes frame. You can see the original here:
http://untestedprototype.com/2014/07/r-250-fpv-quad-plans/
Was thinking maybe a few additional parts sections could be: OSD, Antenna, and maybe LC Filter? Although LC Filter may be best as a misc part, because they are often included in PDB and OSD.
Some good suggestions. I'll see about getting those added.