Well, with the wing areas and weights of modern pattern ships what they are it really doesnt take much to fly inverted, on that same note the planes are soooo stable anyways I dont think it really matters where the wing is for inverted flight. I think from your picture that you have it in about the right location, I would try it out, it is simple to move around later for "experimentation". I have also talked to guys like Hebert about adjusting the stab to remove knife edge mixing, what I got on that was essentially, it makes little to no noticable change in knife edge mixing if you move the stab up or down. That tells me that this is really an insensitive part of the design. Some designs like the Typhoon have the stab very low (like 1" below the thrust line) and seem to do quite well. So my suggestion is to put it where you think it looks good, fly the crap out of it, and determine what thrust/incidence work best for that placement of wing/stab. Now on the Vector (which I did all the initial testing of) has a wing/stab arrangement that looks similar to yours. It has a downthrust of aobut 1.5 degrees, with 0-0 on the wing/stab. Some of the lower wing designs have 0.5 degrees down with a little positive on the wing. When my Evolis's arrive (soon I hope I am dying here) I can see if I can accurately measure the downthrust etc etc for ya, then you have a top end machines notes to compare with!! Later