Paul,
could be my old eyes, but the subs don't look too bad if you ask me. I know you are the ever perfectionist, and this is to be admired, but to me they look OK.
If Mr Tak says 107mm, then he normally means this and to quite a close tolerance, to the point of almost being anal.
I always too the described distance to be from the rear of the metal to the film plane/chip surface.
Gary
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