Yeah I really would like to see your installation on the 15 with the Alphas.
Most of the documentation I have seen suggested the S or C series amplifiers.
My 16M Model B has a Serial Spindle.
What I like about the A06B-6058 "S" drives is that they are rather economical, yet I have never had one fail.. while I have had with others. They are also easy to set up.
I still need to pick out amplifiers for the 18i Thought about using the A06B-6096 or 6079.
I agree with you on the HONDA MR type plugs. they are solid.
Greg