Tim,
I am eager to hear what you think of new JC-1's with your modified maggies. I've heard this amp takes a while to break in. Give us some comparative examples agaist your BAT VK-500 you had. Maybe before you change to the EMMlabs front end.
I have yet to by pass the tweeter fuse on my 3.6R's, but I am planning on doing so when I have time.