Hi, Bill!
I welcome any questions, of course, but like you say, the review is mostly "general", sine the OAS is the basis of the entire Wersi OAS range.
Earlier, I had the Wersi Abacus, and it's for sure a great keyboard-version of the Wersi organs - you get the sounds and "everything". That's one of the things I like - if you need a keyboard, you can buy that, and if you need an organ, you can choose that - and you still get the same system, the same sounds and features.
Happy playing!
Best regards,
Thomas