Why an L/48 short barrel and not the L/70 long barrel? The short barrel was a stop gap until the long barrel could be brought into production. It would be more appropriate for earlier in 1944 with Zimmerit.
It's a fantastic looking model, but at current prices it needs to nail it. I can't find an L/48 with a factory ambush paint scheme.
The sources I have access to indicate that SS Panzerjäger Abteilung 1 had 21 Jagdpanzer IV (L/70) on Dec 16, 1944.