FYI, it's 75mmKwkL48 on the IVH, and yes, the argument proving conclusively that the 20mm Hispano is capable of outperforming a 122mm gun

HTC's tank needs work, period, I don't think the planes (or their guns) are off, just the ground stuff, A tanker tends to take some things for granted with an armored vehicle, climbing a 25degree slope for one, and you can't do it here.
No doubt, they'll look at it in the future.
(One would hope) for now, panzers are pretty targets of limited utility in what is after all a flight sim.
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pzvg- "5 years and I still can't shoot"