WARNING: That's an old style AC/DC amp , sure it's cheap to make but Deadly Voltages may be present on the chassis making it totally unsafe to handle ... Nice to look at but may be the last amp you ever play ...
I had a long discussion the other day with my Luthier friend Vinney at NOG. We explored several variations in CBG design up to the point of making our own boxes, custom machined parts, etc. ... Seemed like the more we got away from the most basic CBG