Thanks for the compliments!
Hey-zeus Jeff, 4 of these cabs and two 2000s? DAY-UM, that would move some serious air! I currently can't justify a second 2x15, but having two would be pretty sweet, and I may build another in the future. I've also contemplated building a 1200s 6x12 to complement this 2x15, but I'm incredibly satisfied with the sound of this cab.
Took it to two gigs this weekend, and all I can say is WOW. What a sound! I haven't played any current production cabs that could match this thing. It has such a well-balanced sound. Not booming booming lows, or super honky mids and piercing highs, just a flat response. I've actually changed the EQ on my Bassman 300 to better suit this cab, by more or less setting the graphic EQ flat with a bump in the mids, and a small raise in the lows and highs, and it sounds so fat and powerful. The only way I can describe the sound is "...like standing in front of a brick wall of sound, just solid." I'd love to pair it up with a 2000s one day.
It's a pretty straight forward build, and if you really set to it, and went straight through, it may take, on the outside, 3 days, if you have all the materials gathered in one place, and don't have to wait for supplies. I think, once I finally buy tolex and grill for it, the cost will be about $600, and without speakers, the cab itself (if you include tolex and grill) will probably be about $300. I consider that a pretty good deal for a brand new cabinet made of baltic birch, especially when compared to what's currently widely available (re: Ampeg 8x10 is $999 and made of particle board or cheap ply.) The other plus is that the cab is pretty easy to handle. It can be a bit unwieldy with one person, but it is by no means impossible. I can easily get it in and out of my truck by leveraging it on the tail gate. With two people, there's no problem carrying it up stairs. Overall, I cannot recommend one of these cabs enough.
P.S. I now fully subscribe to the story that putting two of these cabs together facing each other and playing an open E could put out a match. You could probably do it with just one cab if you were playing loud enough. This doesn't just move air, it makes air it's B*tch.