OK, so I managed to salvage my mistake and I thank
fubar57
for making me think twice about what I did. The dry fitting that I did seemed to point to having the underside of the gun shelf sit on top of the lower instrument panel, which cause the shelf to sit high. At the time it seemed to be the only way this would all work.
My dry fit did not include seeing if the wind screen fit properly. A check confirmed that something was amiss:
So out came the scalpel and the CA Debonder and I managed to get the firewall/gun shelf out without breaking anything. A bonus was that the lower instrument panel came out with it.
Here's a side view that shows the mistake:
I glued the IP back in place making sure that it was vertical and then replaced the firewall/gun shelf. Lo and behold, it dropped in nicely and looks much better.
A recheck of the windscreen fit shows that the problem seems to be resolved:
And now you can see how the gun shelf and the triangular bulkhead slid down and fits tightly IN FRONT of the instrument panel.
I'm glad that I was able to fix this with minimal pain and hope that the rest goes smoothly.
This could have been avoided if the instructions included a cross section of this area showing how all of this is supposed to look when it is together. All of the later Eduard kits that I've built include such things but this kit did not.
Onward and upward. Now, as for the wheel well colours, the online consensus seems to be that most production 190 A/F's used 02 for a wheel well colour. The video I posted was referred to by a
guy at Large Scale Planes who asked the same question as I did and, to my eye, it seems to indicate bare aluminum, not 66. If you look at the head-on view I posted, the rear wall of the wheel well appears to be quite light and if it was 66 I would expect it to be much darker, especially since it is in shade. Here are pics from the LSP thread showing apparent use of 02:
As for the Cosford sample, I can't explain that one but it seems to be an exception to the rule.