I'm with you. I've made several two-way designs that run the midwoofer pretty high too. I like having the vocals come entirely from one driver. Some of mine use the driver electro-mechanical rolloff exclusively, no crossover, first-order or pseudo-first-order networks. In other cases, I've used a combination of driver rolloff with a little help from an extra pole or two from an electrical network. But either way, they run the midwoofer up through the vocal range.I used to have some designs with Alpha 15's, but stopped making them because the box was so large. But they're perfect for use on open baffles, as you have done. The central forward mounting of the tweeter is interesting too.