I read the previous posts before I started this thread. However, in the case of my A10, I believe I must have measured the offsets before removing the hubs and found the rim was central and then assumed I would remember this when I came to re-build them. Normally, I write down what the measurements are. I also checked earlier with Central Wheel Components who confirmed their data base shows the rim to be central.
After I've re-built the wheels and re-fitted them to the bike, I'll confirm what the results were and whether I had to adjust the offset afterwards.