Jon,
I confirmed the actual fuselage lengths from various sources:
E190 is 36.24m (1/144 scale is 25.16cm)
E195 is 38.65m (1/144 scale is 26.84cm - not 26.40cm!)
I measured the kit parts myself, and they correlate with my data.
The fuselage difference being 2.41m (1/144 scale is 1.68cm).
One-third of the stretch was forward, leaving two-thirds of the stretch aft.
So, 1/3 x 1.68 = 0.56cm forward (not 0.4cm), 2/3 x 1.68 = 1.12cm aft (not 0.7cm).
Your incorrect E195 length was what mucked up all the math...
Cheers!