It'd probably come down to the JG11 histories.
A quick research in the Orders of Battle for the III./JG11 shows;
1. Anton Hackl was the Group Commander(GruppenKommandeure) of the III./JG11 between October of '43 to May of '44
2. The III./JG11 began its transition to Fw190As in January of '44
3. The serial production of Fw190A-5 began in November of '42. The serial production of the A-6 began in June of '43 and ended in November that year, with 569 planes produced.
4. The Fw190A-7s, which indicate the development of the latter 190s equipped with MG131 and 4x MG151s, was just making it to the frontlines when its production ended after only two months(production ended in Jan. '44) with only 80 frames produced. All of the rest of the 190As produced in '44 were Fw190A-8s. The A-9s began production from August of '44.
5. Thus, in January of 1944, when Hackl was in command of the III./JG11, and its transition to Fw190As happened, it seems unlikely Hackl would have received Fw190A-5s for any reason.
6. At Jan. '44 even the A-7s were stopped in production, and the A-8s were coming out. The bulk of existing airframes would have been A-6s. A-5s were deemed outdated and made its way to SchlachtGeschwaders(ground attack units).
Alas, it seems Hackl wouldn't have ever been in A-5s.
Thus, the depiction of his A-6 airframe would demand a choice. When I did Hackl's A-6 with the older 190 models, it was upon a request from Crumpp, which I wasn't completely comfortable about. Since no one else was much interested in doing 190 skins except a few people, I figured I'd probably be the only one doing an A-6, and one A-6 scheme among A-5s wouldn't hurt much.
But since after the new 190 3D models, the interest in skinning 190s have grown a lot. And frankly, there are much more A-6 schemes to be depicted than there are A-5s. References and resources regarding the A-6 skin is much more common than those of A-5s.
So...
If for any reason an A-6 skin is introduced under these conditions, it might become a bad precedent. I for one, would not be too glad to see A-5 skins filled up with A-6 schemes.
...
Damn, I guess I won't do it.