I have declared my garage a Model A free zone in 2014.
Put a known good coil on the machine for one last test. Started up, ran great for 15 minutes then got rough for a minute and quit. Repeat restarts same thing. Checked for junk in the carb, spark, played with the GAV, ignition switch , now will not start - everything on this thing is new or close to new.
Therefore my love affair with my roadster is sadly over. Thanks for all the help.