Thank you Chrisses,
Fixed the engine colour with Revell SM302 because Humbrol enamels seem to be phased out in Holland, masked a bit, looked up the Airfix and Eduard1/48 scale Blenheim instruction sheet as well as the 1/72 Eduard one and will add a parachute behind the pilot's seat, failed to find a navigator in the spares box because I think they're childish, they obscure detail and won't fit the scene of an aircraft on the ground. The stash will have to provide for this ceiling gem to be although it's mostly 1/48th.
Now because this was supposed to be an oob build, the first thing I did was scan for ejector pin marks and fill them with Mig Classic Arming putty as well as sprue goo made up from the finest Monogram plastic from the first run of their B-17. Being more used to older moulds than newer ones and the omission of them in the instructions, I mistook the dents in the fuselage behind the turret as moulding errors and smoothed them out before discovering they're intended to be there. To what purpose is not clear to me and I'll ask a YouTuber or two who do quite extensive research. Unless someone here can shed some light on these dents.
The topic by this Simon mentioned cutting out the non-transparent lights on the wing tips which he replaced by leftovers from a Stirling so now I'm contemplating to cut them out as well and start with an effort to replace them with parts from the ventral turret that version I'm building lacks but is included.
Cheers, Theo