Hey Walt,
I'm glad you're interested in my Crusher horn. My Crusher horn is intended to be an answer to the call for smaller, more transportable horn-loaded enclosures, for those who find the LAB to be too big and bulky, and who can be content with slightly less deep bass response. There have been many who report that they would rather carry a larger number of smaller enclosures than a small number of really big enclosures. There are lots of people who don't think the HL-10 is as perfect for horn-loading as Eminence advertises, but it has been demonstrated in another thread on this board that you can get perfectly acceptable response out of the HL-10 as long as you've got a relatively small horn throat. I also took a little bit of inspiration from Bill Fitzmaurice's designs, which use a slightly largish rear chamber to let the horn have that little bit of extra extension in the range of transition from horn loading to direct radiating. The only thing is, I don't know too well how this will affect power handling. I may decide to make it smaller.I realize that my design has almost the same external dimensions as your Punisher, so we're almost in competition on this, but my goal in this is not to "Crush" the punisher (The name instead comes from the sort of output you'll get when you stack a bunch of my boxes together) but instead to provide a good, small horn for the Eminence HL-10. There was word of a horn designed by Eminence for the HL-10, but that has yet to materialize. I think it's a good idea at this point to let you know how my horn differs from your Punisher horn: My horn has a larger compression chamber (not extremely large, but large enough to accomodate the driver's entire mechanical excursion) and a different folding pattern nearer the horn. Also, it does not use battens to mount the driver access panel, but instead has an extra layer of 1/2" plywood on the side walls of the entire horn. While it's tough to describe my way of having the access panel, it will be apparent from my drawings.
The other problem is that in the United States, the Ciare product line isn't exactly super-available as best I can tell (I haven't looked super hard but in my Google search I didn't turn up any American sellers). Eminence products, on the other hand, are very widely available. The 12.00SW is certainly an interesting driver, though. I haven't had time to get my Crusher horn into Hornresp. that will probably come in the next week or so.