Hi all
I had another go at making a layout that kept ZXCV and right hand punctuation as per QWERTY, except for semicolon of course.
The result ended up as a partial mirror of Colemak, though it was developed from scratch / first principles.
Ended up with with two variants, the Fingers version does better on my version of KLA KLAnext, while the Words version does better at word metrics and overall.
To get from Fingers (attached) to Words, rotate O A U one move counter-clockwise so that U is above E and O and A are both on the home row.
Cheers, Ian