Re: Entwistle tone -
IMO, Anniversary electronics help, but aren't totally necessary.
It is my experience that the most important component of the Entwistle tone is perfecting the typewriter tapping technique. If it is executed correctly, any Alembic electronics package should have enough sensitivity to reproduce this technique.
New strings, longer scale and low action also help as you don't have to tap as hard to get a ringing sound. It actually sounds better if you ease up and use a gentle, precise tap (as opposed to a hammer) directly on the fretboard somewhere between the 18th and 24th frets.
I have a Spyder with the Anniversary package and a Stanley Signature Deluxe with the same electronics as your MK. Like your MK, the Spyder is 34 scale and therefore rings a little more than the short scale SC, but, electronically, either will deliver the harmonic nuances produced by the tapping technique.