Massive audio,SPL Dynamics and Magnus audio and a lot of others.
Those boards are very similar, although, I haven't yet seen this *exact* board in usage. The primary difference being this one has a massive cap bank compared to most other similar designs.
i was considering doing a 3 footer
i gotta get the fuse holders and everything else all caught back up though. Just when i think i can start doing some new stuff, i am out and have to do an entire new run of the last products. I guess it is a good problem to have