Nice to see the 373 MC progressively quitting the stock....
As far as 375MF is concerned, part of the stock is the dried seed (viscosity like 374MB or 373 MC), the rest being "real" 375MF (if any left).
"Real" 375MF viscosity is lower than 373MC, intermediate between 372LD and 373 MC.
Not sure whether we need to get rid of "good" 375MF now......