Thank you, Eric.
The 3015LF just doesn't sound as good in the midrange as the 3012 series, to my ears anyway, and finding a compression driver that will go down low enough to meet it is a challenge. Of course I could use a cone, but then I'd just be replicating the work of others. I want to do things that put new choices on the menu.
Okay for loading my big
190-pound home audio speakers in and out the back of my Scion, I use a "slippy board". It's a four-foot lightweight plywood board (reinforced longitudinally on the underside with 1x2 white pine "rails") that's covered with the slickest cloth I could find at the fabric store. I can slide the speakers up or down it, and never have to actually lift them. Go with the longest slippy board you can comfortably fit into your truck.
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By the way, another cabinet line that I just read up on last night which looks very good to me is
Baer Amplification. Roger is doing high-end cabs with a custom Eminence 3012-derivative woofer and an especially nice Faital midrange cone. My cab certainly isn't going to be all things to all people and the Baer cabs look like very strong contenders for those who prefer a very high quality paper cone midrange.