[Johnny's Journey]

My board went out because of a long list of issues I've found and corrected. There are at least 3 part numbers so far that I've seen available. Mine came with P/N 91346. I'm wondering, is this an old design ? Second question, if there is one circuit board that is better and if so what P/N should I be looking for ? I ask because many of these boards are out of stock or sold out. Thanks