1st TMCC upgrade

They come in a variety of sizes, so you can have a shorter one on that locomotive if you desire.  You could also use a short one on the front.

Cool. If I can get the shorter couplers, I'll do both of course.  Thanks.  I'm not sure what kind of scale that is you use (in tenths?), but when I measure them against each other on the screen, it looks like the shorter one is 3/10 " (?) less, or a third on an inch (? again).  That'll work!  

I believe the short one is 1.75", then 2.0", then 2.5".  Don't know if there's any shorter or longer ones, but these are all I've ever needed.

The short one actually measures 1.7", it's the MTH one.  I also have Lionel ones that are also that size, these just happened to be in the junkbox and easy to grab.

The rear coupler is normally the dummy to attach the second engine, which probably accounts for why it looks so long.

Boxcar Bill has some 1.54" long, which match what is on the locomotive.  I'm going to order a pair along with some other parts for other projects.  Cool little engine, and the F3 sounds are great.  Here she is pulling my NYC streamliners, which is what she came with in Wabash livery as part of the Bluebird Special set.  Should look great with the matching cars. 

I could attach the lower headlight to the strobe port and make it a mars light effect, it's one wire connection away from doing so, but in this case it may be too much information to the end user.  Speaking of lights, it's a little dim in that dome car.  Another job opportunity.  This was a fun and easy project. 

I thought there might be shorter ones, but I haven't actually seen them.  I may have to get a couple myself.