Progress! When I have the grandmaster set to 50% and execute the command "specialmaster 2.1 full" ....it does indeed put the grandmaster back to 100% !! Now I can use commands such as "specialmaster 2.1 at 50" to set it to half of "specialmaster 2.1 at 0" to trigger an "official" B.O. using a macro!
Now i just need help assigning this to a normal executor so that I might be able to control it via slider. Any thoughts on that, perhaps Lino?