This is the first update and the best solution for the first purchase! it is the most durable one and has two lids (with now 8 clipping balls) included ... also the holes for LED´s inside like on the 0.7mm version. for Boardsize V939, V202,H36,Ladybird 20x20mm hole distance battery up to 350mah Update 02 has holes for mounting the Hubsan board now! just cut them of, if not needed. Motors: 7x20mm Coreless (syma X1, hubsan, Ladybird.... thread: http://www.rcgroups.com/forums/showthread.php?t=1838771 Material alumide is not tested, but you can get this model in Colours!