Nice one Joe,
I have this model in these markings in my collection. having built 4 of them (one of which is at the top of the page) I know of the canopy fit problem, when showing it closed. I had to carefully sand away quite a bit of both front and back edges. My model of Major Wick's plane has the canopy open for this reason. On this aircraft and as far has I have ever seen on pics of WWII era Messerschmitt fighters, the wheel hubs are gloss black. I use a simple trick when painting wheels: Take a little of your tyre colour and thin it to a wash, let this run around the wheel rim, giving you a thin line. Now, using normally thinned paint, paint up to that line. No need for masks and it is very easy.
I see you have lost the front of the air intake on the side of the cowling? It is not a complicated shape and should be possible to scratch build. I might have a spare, from my 109E-7 Trop build. I'll have a look
Mal