All the A6497 mods are cosmetic. It is a good movement out of the box and of course after a service I have found it performs as good as the Swiss.
The Incabloc mod involves a watchmakers lathe, the correct tooling and a proper watch smith to perform the mod. It's by no means an 'easy' mod.
People have it done because it's the easiest tell to look for in a rep...Apart from the swan neck, micrometrical screw, winding gears, centre wheel etc, etc, etc!
A member named Merlin does the best mod on this movement, but I wander if it wouldn't be cheaper to buy a Swiss 6497 and get it engraved