No kit upgrades other than aftermarket decals which is ED584 EA - U which was 49 Squadron.
Hated the front nose blister mounting ring on the fuselage, just a thick band of plastic to hold the nose in place, this ring had to be altered, so chopped the ring into individual mounting points as on a real kite.
'Artscale' masks used for all the clear parts.
Painted in Humbrol Enamels: H116 Dark Green - H29 Dark Earth - H33 Matt Black, then my usual weathering methods applied.
Building the HKM kit was a real joy, would I build another! ...You bet I would.