Fatshark cmos 600tvl mount 30mm high with 46mm bolt spacing's and works with http://www.thingiverse.com/thing:526498 no screw just clips in. I found trying to get the 3mm nut and bolt sizes right to clear the mounting bolts for the front arm's so I have over come this by putting nut inserts in to the sides so the at domed bolt can come up from underneath.