Has to be my most utilitarian design yet, here inverted ready for fitment of motors. Ultimately the underside is where I'd like the electronics fitted, what with critical aerials being fitted to the underside of airliners and the bulk of their electronics under the flight-deck.
Curiously the three dozen boards controlling an Airbus are located under the flight-deck too. There's open access to this space alongside the rudder pedals, to the extent it is protected by a canvas awning that has occasionally to be removed along with the accumulated detritus: half-eaten pies, rotting fruit, water bottles, used condoms et al.
Re-reading yesterday's post I realise I'd not fully explained the regulatory issue regards test-flying? In the UK the simplest option is to limit its weight to under 25kg so that it qualifies as a regular drone. This entails fitting only four motors and I have done so to the underside to increase ground-effect, improve safety and keep the propellers from harm's way when out of use.
(N.B. if you're stupid enough to build large drones too, note that ground-effect cannot always be relied on to increase lift, sometimes producing air circulation which actually reduces available lift.)
Ultimately then I'll offer this classic 4 x 4, along with a 4 x 8 upgrade for higher-flyers.