Since “1990. Original shop was in Redmond WA. I moved to a 97 year old Granary mill in Kent, WA in 1995 and opened a 7000 sqft Shop, R&D facility and temporary living quarters ( I still maintain that space to this day and its where all current products are built.)
Following capitalization in 1996, I opened a 22,000 sq ft factory in Seattle on Aloha St for 1 year while waiting for the multi story shop on 24th Ave W in the Magnolia district to be retro fit. In 2002, following the sale of my patents, I closed the Magnolia shop and returned to Kent , WA where I currently run a small pro and custom shop.
Dating Boom Theory drums
The first 200 kits ever built will have a foil sticker on the hoops starting with the letters “AJ” Latter kits can be ID’d by shell stamps that indiciate which shop and what years that set was built.” [Source: Al, Boom Theory, email 27/1/2009]