All 2 cm KwK 30 L/50 and 2 cm KwK 38 L/65 should get the same ideal reload speed of the identical Flak counterparts: 2 cm Flak 30 L/65 and 2 cm Flak 38 L/65,
Like the 20 mm Pvlvkan M/40 in Pbil m/40 and the AA vehicle have. Overall the 6 sec reload in the Pz II turret is relative, tho especially in the bigger Sockellafette (Sd.Kfz.222) and Hängelafette (Sd.Kfz.140/1 and 234/1) should get the same AA reload speed.
In short:
2 cm KwK 30 L/50
2 cm KwK 38 L/65
Reloadspeed: 6 → 3 sec.
(On the found vehicles:
German and Chinese Sd.Kfz.222, Sd.Kfz.234/1, Sd.Kfz.140/1, Pz II Ausf.C and F)
J-7E
Air SB 11.0 > 11.3
This thing is way too good at its current BR and could probably go to 11.7 but that might be too big of a change in one go. Move it to 11.3 first and see how it does.
It have extremely effective anti aircraft guns, mounted on a mobile platform with a lot of turret traverse, meaning that it tear apart any planes that it faces. The plane it faces doesn’t even have a chance against it, since most of them are WW2 or just post war planes, with low manoeuvrability.
J-8B
Air SB 11.7 > 11.3
The J-8 is outright worse than the MiG-23, it has no business being 11.7 with that awful radar and RWR. It’s so bad that nobody even tries to fly it, which is probably why you don’t have stats on it. It could possibly go down to 11.0 but probably best to only move it one step and see how it does.
Merkava Mk. 2D (Realistic Battles)
9.7 → 9.3
No difference on the Mk. 2B which is at 9.3 other than the additional composite armor which wont help you against APFSDS most of the time since it’s still the same armor layout.
if not viable on being at 9.3 then give it the M426 APFSDS which was used during the exact time the Merkava Mk. 2D was active.
Sagittario 2
Air SB 8.0 > 9.0
This thing is just absurd. Way too maneuverable, way too fast. It’s basically impossible to beat in a dogfight unless the other pilot is spectacularly bad.
