The excellent Mr. Bergman recently released the Centaur IV AA tank, mounting a pair of 20mm Polsten cannon, in 1:100 scale (15mm).
(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZX3m8l5TuzBl-Ss4mQRdZeszsZUFwt_UZF7pDf2S-Rgt8Zw9nOtl3Ty47PeU8zRJhASpFpdnkq1RPgmKRrto78U9_O9B1zvw17aFVwI0Ifuoc4sWvuf_URDG6wglljTILmPY4KJ7LF8JL39S3BJouWzwowVATM1YpIl40o9OcfBj_D0B6Z_apseuEvQ/s1200/2023-02-14_Centaur-IV_AA.jpg)
It was not as common in action as the Crusader version, which mounted the heavier 40mm Bofors, but there were a few of them in Normandy. Neither version was much used in its intended role, as the Luftwaffe was not in much evidence in the skies over D-Day and after, but they were very effective at engaging ground targets.
I've shown it here with a few PSC plastic 15mm British paratroops. I haven't yet supplied the vehicle with any crewmen; I'll get around to that one of these days. I printed it on my Ender 3 in eSun PLA+ — the layer lines are much more evident on the turret than they were on my Cromwells, due to all the sloping panels. Nevertheless it will do well enough for a gaming model.