Go for it, it will look much better with the centre dash which is the traditional iconic Mini dash, (even in new generation modern MINI's) and if a future owner wanted to change it back it is not that difficult to do in the overall scheme of things. Unlikely anyone would want to refit that non-original ugly 'homemade' looking dash and centre console anyway! They used to be on sale at Mini shows but never understood why anyone would buy one....
As said you will have to drill a hole for the speedo cable, etc as later Minis have a solid metal bulkhead with no large central hole.
thank you.
I feel better. I think this is the kind of feedback I wanted. To say my idea is ok. But I understand now that it can be reversed later, if needed.