These legs are a remix of GavinBendtson's DJI leg extensions, i just redesigned them to work with zip ties rather than nuts and bolts. I included two different versions as there are knock-off brand flamewheel's and, while they may be high quality, are dimensioned just differently enough to be incompatible. If you don't know your brand, one of the more commonly bought clones are labeled with "HF."
Assembly is pretty simple. Print out two halves, one should fit neatly inside the other. The zip ties should fit through the 4 rectangular holes.