I am really glad that you are successful with Blackhawk (remember, we chatted at the '06 Kazoo Musciano).
At each successive Musciano, both Va and Mi (and I assume CA and Toronto), the percentage of Musciano models as manufactured by Blackhawk increases, and the % of Scientific original kits (and perhaps scratch built, too) goes down.
The Scientifc kits have become increasingly scarce in the last few years (less on ebay, and almost nonexistent at swap meets), so people are reluctant to build from a kit, or simply cannot find the kits.
Currell