I just got done with a pair of t39's. Including the new self powered amp. I finished impedance testing and setting the dsp about an hour before the show I wanted to use them for. They'd been under construction off and on for a couple of months, I dithered around on them. Only when the time was getting close I knew I needed them did I bear down, every evening after work, every day off, just about every spare minute to get them done. There was quite a bit of custom work to do on them, so they took a while. Plus I experimented with a few new techniques on these for proof of concept.
Why does it always take a deadline? I just don't get it done unless I have one, either manufactured or real.
Oh yeah, 4 DR250's, 4 t39's, completely self powered system. 2 DDC520's running the whole show. Sweet. Pics before long on Bill's forum and my site.