@Rusty Traque posted:
E3's, E4's and E6's were essentially the same externally. The only thing the E4 had externally the 3's and 6's didn't have externally was the retractable nose door. Of course, the E5 had the stainless steel fluting, letterboard and smaller side windows.
I know about the door on the E4. Jonathan commented earlier in thread about roof details differing. Did I misunderstand ?