Two more follow-up questions, if you guys don't mind:
1. Relatively speaking, how difficult is it to remove the spring bars on an AT? I know that some watches (such as the Tudor Pelagos) have spring bars that are notoriously difficult to remove.
2. For a 41.5mm AT 8500, would I be looking at 19mm lugs? Just want to confirm and not purchase the wrong one.
Thanks again for everyone's help and the inspiring photos!