The SIDE VIEW reveals more detail changes, and confirms those we just talked about. The air inlets are shown both on the SIDE VIEW and the FRONT VIEW detail, (which was NOT erased). The finalized version IMHO, was a move toward more conventional, less complicated construction for the fuselage. The rounded jet fuse gives way to a boxier, easier to build fuse, yet the final look of the plane are not changed all that much...much of the fuselage is hidden under the swept wing.

In addition, a conventional fuel tank position was first planned, but then abandoned in favor of the rear location over the C/G. Doing this however presented some real problems to overcome as a pump would be necessary.

Notice also that originally there was a mock jet exhaust planned, with the rudder ending above it. The rudder was later extended down to the bottom of the fuselage. The original sketch shows the conventional two wheel main landing gear rather than the much more involved and ambitious 4-wheel arrangement of the final version. Remember not only were there four wheels, (which I don't believe I've ever seen on ANY pattern plane since), but Tom devised an electric braking system on two of the wheels, (perhaps when he learned the site of the 1965 NATS, with its concrete runways).

Retained in both the concept picture and the final version were the droop wingtips, the LAS, (lateral area special) outline with large vertical fin and the T-stabilizer, flowing into the partial bubble canopy. The wing to me at least, seems largely unchanged from the concept sketch all the way to the final aircraft.