Great model there mate. I like it. The main thing is to build a model to your own pleasure and you don't need to bother with all historical details to do that. Only few things separate this Bf 109E to be historically accurate though - sand filter, white fuselage band, wider fuselage crosses (as mentioned), JG 27 badge on engine cowling and demarcation line between two camouflage colors should be extended to the lower part of the fuselage like in the profile below...
But as I said, great looking model as it is. Cheers!