F450 Frame 12 mm Carbon Fiber Arm Adapter
thingiverse
Make the 2212 motor mounts you can find at http://www.thingiverse.com/thing:2094930. You'll need a few other things too. I picked up a Tarot Firefly FY450 frame kit, but the arms aren't that great. Print these out and couple them with some 12mm OD x 8mm ID carbon fiber tubes cut to your desired length - you can turn this frame into something amazing. Keep in mind it's still a work in progress. You'll need four of each part, plus: 8 M3-35 Bolts 8 M3-30 Bolts 32 M3 washers 16 M3 Nyloc Nuts Print them out in PLA with .2mm layers and 50% fill.
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