Yes you did miss it a bit.

The last seat you have on the left is actually an enclosed lavatory. There are only 3 seats per side - 2 passengers per seat for a total capacity of 12. The mid section is open for freight and the fwd comp contains the 6 cyl gasoline engine with the generator behind it and radiator on the front left side. There's a seat on the right front for the motorman. I think there was a set of plans published for it - NGSL back in the 80's maybe. I thought I had a set so maybe I'll keep looking.
A couple of things I noticed. The original paint scheme is probably not too bad. The lettering would have been orange though at least at most times. White and yellow might have been used at one time or another. Gold appeared after 1960 when it came back as a tourist railroad.
For the tourist era - 1960 thru today - I think oxide red is more appropriate for doors and roof. The pictures I have indicate a darker red then you found. I guess you'll never satisfy everybody no matter what you do.
The loco mass was around 92000 lbs or 41700kg roughly 2/3 of the config entry. The enginespec is based on a 100 hp engine which was reduced to 80 hp to develop the throttle power curves. I think this was ok in TRS06 but I'm not sure the 20% reduction is ok for TS09 -12. I just mentioned this in another thread so I guess I'll have to do some testing now to verify if the game, since TS09, makes a 20% reduction in the config values or not.
The M-1 was rated 250 hp and the engine was said to develop 300hp which powered the generator that drove 4 - 75hp traction motors.
In any case it's a bit overweight and underpowered. 8-(
Sorry to be such a nit picker. I do like it though. It's a wonderful addition to the EBT roster.
Thanks Ben,
Bob Pearson