Digital BW, The Print

My 7600 uses UT7, with Eboni K, and the MIS funnel-fill carts.

I understand that flushing is required when going from Ultrachrome to
Eboni-6, but what about UT7 to Eboni-6?

Since the K and LK appear to be the same in both sets, can I assume
those 2 are fine?

For the other 5, do I need to get new funnel-fill carts, or can I just
drain the existing ones, refill with 5 the new inks and run some purge
patterns until the new inks reach the head?

Thanks,

Mark