I don’t have to have it at .001 or less Charlie, but the manufacturers tolerance is .004. Looking through the original factory manual, the 90° tolerance is listed at 1/32" (.03125), but the online version lists the maximum allowable difference as .004. That’s a considerable difference (681%.)! I wonder why the change? My manual doesn’t even show a procedure for adjusting the 45° parallelism.
I know what you’re saying Charlie, but being new to all of this, I’ll err on the side of caution and follow the manufacturer’s latest recommendation. There is an added benefit to tweaking it as close as possible. If something doesn’t fit quite right, I’ll know it’s me, and not the equipment. At this stage of my woodworking development, being able to trust the equipment to be accurate is a huge burden off my mind.

Where are the band-aids?---Pro Libertate!