thanks for the info,
i have been doing a bit more research and apparently phase reversal on a humbucker isnt all that good, apparently the closer the two coils that are being switched out of phase results in a thinner tinnier sound, not all that appealing really. i love the sound on my brian may setup switching the bridge and middle out of phase so might be able to do that just switching the bridge and first neck out of phase. as for how the sustainiac will cope, im not sure, they did supply me with a wiring schematic for a 2 pickup guitar with individual on/off switches so i assume just extending that will yield some results. only thing i worry about now is how the sustainiac will cope with the mississippi queen beside it, its a p-90 and sustainiac warn against single coils neck to the sustainer although apparently the mississippi queen is very well shielded and quiet for a single coil. just trial and error i suppose, its my first guitar from scratch, bound to make some mistakes i guess and if i have to loose the mississippi pickup at least i can cover it up and no one would ever miss it.