Decals done on the left side. The decal guide doesn't show walk lines but this might make sense as I can't see any stencils on the photo. The red paint is a gosh darned close match to the decals
One thing other builders haven't done is to add an IFF (?) under the right wing (2). There appears to be a whip antenna at the (1) spot. If so, is this offset to the right?
I say appears as this is a photo of the aircraft in later life
My plane for the under wing antenna is to use the "not for use" fuselage antenna and some wire for the whip antenna
My first impression when bringing your post up "OH WOW." Got to give it to you George, it is a stunner and as for the extras, go for it, there on the B&W photo.
Today at our local museum, I was asked what a long item protruding from the wing of a clipped wing Spitfire Mk XVIe was. I had always assumed that it was an antenna of sorts. I put it to the Spitfire experts out there to come to my aid. Thanks for your help.
Yep. radio whip antenna slightly offset to starboard.
The IFF antenna was a dipole type, often painted a "faded" yellow (later bright yellow), and mounted in a rectangular panel which you should find near the aileron hinge line.
The kit's "not for use" upper fuselage radio mast will be too large - use a length of stretched sprue or thin plastic rod, flattened slightly (in pliers or vise) to give the airfoil shape. If it's not possible to flatten, then the sprue / rod will look more than acceptable in this scale.
Pic below shows the IFF antenna on my 1/32nd scale Mk.VIII.
You've obviously done a nice slow and gently file back there George, I'm impressed. If it was me, the mast would have separated from the sprue and probably gone into cyber space.