Since the White is actually a board that tilts with the machine (unlike Singers that only the machine tilts) I would suggest you have someone make you a board that you can replace the original in your cabinet. That way if you ever do want to put it back to original - you can.
It sounds like your cabinet was for a VS machine, and not a rotary. I measured mine and that is about what it is. I have a machine like you are looking to get too, mine is the older version and the newer version is slightly different.