Going by what was said about control surfaces, i rember the British Vucan bomber had 4 surfaces, the outer two where mostly aileron, the inner two where mainly elevator, tho each had some or the other mixed in.
im a firm beliver on deltas and swept wings the elevator should be in the middle and at the rear, and ailerons at the tips and forwards, that way you avoid tip spins form uneven elevator movement and flap effects.
Thats why my own delta design had a swept forward TE. it either worked as i just explained, or it was the best set up delta i've ever flown.
in my mind, the surfaces on the wing in the center can only really be used as flaps, with maybe some aileron mixed in. the rear tail planes are elevator, again, maybe some aileron mixed in, and the outer wing pannels are aileron only.
reading back thats what you intend to do.
i like the rudder idea.
to help with strength and bending loads, you could have one full length tailplane maybe, but at the spans shown in your design that wouldnt be pleasing to the eye, which your whole idea so far is to me.
As for needing computers to fly jets, thats only coz the CofG is so far back the plane isnt stable + all the other bits they do. any model designed in our normal limits of weight and balance centers has potential to fly. i have a Spinsation and its very stable in flight.
Swept forward deltas are also self stablising in ground effect.
DAMN! now i've got that WIG craft in my head again
i want one of these

oh yer, i just remembered. you might have trouble taking off, the front wings will be in ground effect and sucked down, the rear wants to fly in ground effect, i can see a point as it just manages to get free from being sucked down the front section suddeny gets lift and it flips over. my susgestion is to have the gear longish ( wings out of ground effect), and a nose high sit. my Spinsation is too flat and it jumps into the air. i have to let the sticks go, wait for it to level on the rotation, climb a little on its own, then pull up.