ive been mulling over your design and ive come over something, the dispersion of the mid horn is very tight, as its essentially a point source in that respect rather than wide horisontal dispersion usualy found in line array wouldnt you need to array multiple cabs horizontaly to get enough mid dispersion to cover the audience?
yes that has been pointed out LOL. i have been told my mid would have inadequate dispersion above say 800 hz so the only solution i can think of is to use a high dollar compression horn that can handle a lower x-over point of say 800 or 1000hz..
then i wondern if i put some kinda fins in the throat if it would help??
i did have an idea of cutting the 8" off at say 800 and adding sealed back (2) 6.5" per side on themid's throat