How were the T206 printed?

[Lunker21]

Ok... Im looking for resources to understand how the T206 were printed.
I have scratched the surface to understand the notion of player repeats in columns, with multiple players in same column. (From cards with same name top bottom, and some w different player over/under)
And different players in each row. (From cards w diff players side to side)
...and obviously different backs and factories.

Quick questions...
1)How were the presses set up for the different colors for one player?
(7 different presses? One for each color plate? All arranged with the same AAAABBBB columns and ACEG columns?) So like 42 plates x 7 presses for one player card run?

2)What were the plates? Stone? Metal?

3)once fronts printed all colors, Were all backs printed centrally, then cut, then shipped to diff factories for 'fac stamp' (on cut cards?)
.. or were all fronts printed centrally, shipped large, then backs/fac# printed in separate locations, then cut?
... or were there multiple sets of plates for same player at separate print shops? (So fronts, backs, factory # printed in different locations, then cut?)

Has there been any comparison on prints of a single pose from one factory vs another? (Meaning... if there were multiple plate sets, were there slight differences?)
...and if there arent differences between sungle pose from different factories, does that imply a single set of plates for a player pose, shipped factory to factory?

...and what happened to the plates? Not a single remains? Metal and melted for war? Stone and resurfaced?

...finally, overprints... if a fac 30 ny being overprint by fac42 nc... front and back printed at fac30 ny.. then cut.. then shipped to fac42 nc to overprint?
If overprint by whole big sheet... all 'offsets' of a miss should occur in exact same (wrong) spot on the number of cards on the sheet...
Are there any examples of an overprint error in exact same wrong spot on different players?

Thanks in advance!

Craig