these look good! there is a V1 and V2 version and also a 30mm diameter version! http://www.aliexpress.com/item/CNC-..._73_74_75,searchweb201527_4,searchweb201560_9
Hi Alex about a year ago you where experimenting with Secraft folding boom brackets have you finish that copter and how do you like the Secraft folding brackets are they holding on ok thanks