Both sides and shils are included:
Yorktown Class upgrades (12/41, 4/42, 7/42 - stock database limited)


Yorktown Class upgrade 10/42

Shows the new SC-2 AS and SG SS radars, as well as the 40mm Bofors added to the bow and stern. The crane is visibly changed and some of the aft hangar deck side doors are opened.

Yorktown Class upgrade 10/43

Shows the addition of the SK AS radar.

Any feedback is appreciated.
A possible change I have in mind is to make another image side/shil for the 7/42 upgrade when the class upgrades from the CXAM type to SC type radars. Is it as simple as changing the assigned bitmap value in the Editor? Would modifying a scenario file disrupt any ongoing games if all I'm adding is new art to existing ships in the database?
If adding art is fairly straightforward, there are other ship classes I'm interested in tweaking. I've spotted a ship with radar visually installed before the class is fitted with any, as well as have noticed there is no visual difference between the long and short hull versions of the Essex class.
Credit goes to The Shipping Channel for the source line art, as well as the great in-game art that I used for reference.
Edit: Consider this a 'prototype' - I discovered issues with this version that I will address in v2.