I am currently working on my 3rd Brassmaster build, and I already have a 4th one planned. It's a great circuit (opinions vary, of course). As a sort of WIP thread, I decided to collect them here.
#1
Here is the first Brassmaster I built. It was a kit build from GGG, using a board designed by R.G. Keen. I was quite happy with it, but I sold it a couple years ago to make room for new stuff, and I knew I could build another one better someday.


#2
This is the one I built as a gift to my brother after he bought himself a bass guitar. I squeezed it into a 1590B, and it was the one and only time I successfully etched an enclosure.



#3
This is my current project. Another 1590B build, but this time with 4 knobs. Again, using R.G. Keen's board from GGG. I just need to make the box pretty and solder a few things, and it will be done. The fit is only slightly tighter than the previous one (mainly the 3PDT toggle needing to be placed just right).

#4
I was quite excited when Brian announced the BoomBoom. I have the board in my possession, and I plan to make something special with it.

Several years ago, I cobbled together a combo Brassmaster and OC-2, with the Brassmaster input being selectable from clean, one octave down, or two octaves down. Those same signals were also mixable with the output. I really liked it, but in a fit of depression, I disassembled it. I'm planning to rebuild it and improve upon my earlier version. Suboctaves into a Brassmaster make some gnarly sounds.
I don't have a pic of the finished old project from before I tore it apart, but I have this partly complete pic.

Hopefully, the rebuild will also fit into a 1590BB. I have no idea why I used a stereo input jack for a pedal that can't fit a battery, but I'm guilty of having done this more than once.

Anyway, I plan to add updates for projects #3 and #4 here eventually.