I built a HJ-Y3 tricopter and could find no good way of mounting the two Plush 18 ESCs I wanted to use for the front motors. The solution was to make mounting plates with room for zipties. The Plush ESCs are rather large, so I think the holders should work for pretty much any ESC that is usable for this particular tricopter. The plates are held in place by the original arm bolts of the HJ-Y3. No drilling or modification of the craft is necessary.