The biggest problem with this particular kit, is that it is possibly too accurate !
The mould tools are based on an airworthy aircraft at Duxford, and Revell seem to have got everything as it was on the 1:1 subject, including the lack of pilot's back armour, the later MkV type oil cooler, wing reinforcing plates, late style metal-skinned control surfaces, etc etc.
It's a shame that model manufacturers don't ask questions when given access to a genuine subject, given the amount of work involved in measuring, gaining detail photos etc etc, as quite a number of relatively minor errors, but which can make a big difference, could be avoided. An example is the relatively recent Airfix 1/48th scale Bf109E, a very nice kit, but it can't be built, OOB, as one of the options, an E-4, as the canopy has been modelled on the canopy that is on the RAF Museum's example, which is from a Buchon, and has the central, vertical frame !
BTW, the lens on the gun camera was normally inside the opening in the wing.