Carl, thx for the tutorial on the wing nuts - looks pretty straightforward but at that size not sure how easy it would be.
Marc, the brown camou on your panther looks fine to me, perhaps the dark yellow is a tad light making RB too intense? As mentioned, weathering will lighten it, and maybe some filters can darken the yellow base.
I took the liberty of switching your photo to b/w and comparing it to a fresh factory made panther, assuming it too has already been painted dark yellow. Of course there is also lighting to consider in the comparison.
Again everyone, great work.
I see what Jack is saying as well as Carl. Interesting.
regards,
Jack