Sorry Cees, I got it wrong, it is the rear part of the fuselage that is slimmer, the nose bit up to the wing is the same as the standard Taurus, but with the thicker wing you have to match the wing profile at the trailing edge, hence the change in fuselage profile. If you look at the photos of the wing centre section I think you can see that this was originally similar to the standard Taurus plan shape, but was then sawn and vee'd to straighten the trailing edge, so the sloped ribs. This mod was seen a lot, specially with the aftermarket foam Taurus wings that appeared, I believe that the 'Zeus' used a modified foam Taurus wing with just this idea to get the sweepback.
With a wing this thick the centre reinforcement would be easy, and a bit of f/glass wrapped around and you have the T2 wing. So long as the spar is adequate the bit of sheeting removed for the radio gear would not affect the bending strength. It would be interesting to see the bottom of this wing to see if the gear torsion arms are in-line or slightly swept, like the wing.
The T2 instructions mentioned were published the same time as the photo of Ed 'in Japan', later in 1963, and the T2 illustrated is definitely a standard Taurus fuselage and wing, with the mods listed. It would seem that Ed had been flying his new T2 for a while before those particular words were published.
Evan.