> OK, and what about for example 4.2 Ec -> Ee? Can I skip Ed?

The base E build has all the files, and then each small
update has all the files from all the previous small
updates. So yes you can skip Ed and go straight to Ee.

Starting clean you would load E and then add Ee over the
top, no need for anything other than those two files.

--
Lester Caine
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L.S.Caine Electronic Services