I followed Duane's NVS prototype recipe that he and his prototype-part-supplier Bryan Sunda posted a couple years ago:
http://http://www.wakeworld.com/MB/Discus/messages/65921/79257.html and made my own tower speaker system. Basically a ghetto version of a single NVS 1010, but in 3 separate enclosures. I finally tested it on Saturday and LOVE it. Lots of volume and mid-bass to the rider.
Read through that classic thread on HLCD's. I just called up Bryan Sunda at the number listed in that thread and ordered all my stuff. (2) Beta10's, (1) PSD2002-8, (1) LT-250, a 2.5MHz crossover, and a variable L-PAD attenuation circuit. The L-PAD simply adjusts the mix of the HLCD with the Beta10's. I mounted the L-PAD in the back of the HLCD box so the knob is on the back and easy to adjust the high's up or down to where you like it.
It is wired up as a single 4-ohm load, which is powered by a Hifonics ZX6000 bridged to 800W RMS. I made 3 baltic birch boxes, sealed them with silicone, and sprayed the outside with spray-on bed liner. They use the Polk Audio grilles and Raul's clamps. Still room for the bimini.