Terry,
I have never had the privilege of meeting or talking with Tom Burkland only know him by reputation (and advice he has given others on the forum). IMHO, your talking to an excellent resource.
So the V.5.0 will have drive wheels inline? (still 3?) Hopefully this will allow narrower cross section (smoother taper) at the rear.
My guess on wing placement would be 20% to 30% of w.b. ahead of the effective center line of the rear (drive) wheels, but the analysis will fine tune that. I would think, it not be 50/50 balanced, but biased to the drive wheels for "traction" with enough downforce on the front wheels for stability. A multi element wing, in the horizontal section, should increase the downforce and may be of net benefit (drag racers claim 6000 lbs downforce at ~300 mph with multi-element wings, but CFD should help refine). The body and the "vertical" wing section should act as spill plates making the inverted wing(s) more effective. The initial wing placement looks to be coincident with a reduced body cross section this is good and may be important if speeds above .80 mach are achieved (in deference to the area rule).
Looking forward to V.5.0.
Regards, Don