Other mods Gun Turret mk2's and higher, such as in Bob's, Schalls Ammo Turrets, Modular Turrets, etc... are not listed in the gun-turret
turret_id research for the new Gun Turret Damage research, they still exist on Physical projectile damage research, thus creating this discontinuity where the vanilla turret and two turrets from this mod are upgraded via Gun Turret Damage #
research, but other mods turrets are upgraded via Physical projectile damage #
research.
In addition, moving the gun-turret
damage research off of Physical projectile damage
research is breaking Schall's Ammo Turrets mod's latest migration script as reported to that mod at: https://mods.factorio.com/mod/SchallAmmoTurrets/discussion/5cb8d38e89a79e000d382dfe