ERR Cruise M questions?

The CC-M does have a "nudge" feature to synchronize speeds for a lash-up, so it should work.  Did you try disabling the cruise on both of them and seeing if they run better together?  The CC-M is about the only solution, and the CAB1 is no problem.  As far as a DIY job, that really does depend on your skill level.  There is some wiring involved, but it's not complicated.  I suggest downloading the CC-M documentation from ERR and looking it over.

Gearing configuration shouldn't cause those issues, so one engine may have issues with the ODY system.  Cruise M is the easiest/cost effective way to fix it if it is hardware related.  G

I think for the nudge feature to be effective the engines have run relatively close together in the first place. The nudge is for fine tuning. I would first run both on the same track a few inches apart with Odyssey on. Then run them at the same speed either by watching the Command Base for an equal number of red light blinks or the same number on the Legacy handheld. Or change the addresses to the same number. Then observe how close they run together. A large difference is probably due to gear ratios. If the gearing is not close, a Cruise M will likely not make them run together without overheating them.

Pete

Thank you for the responses.  I did a great deal of testing by positioning them about 3" apart. I tried multiple combination of Odyssey on and off between them.   I could occasionally get them to run the same speed.  But, often the Chessie would jump at start.  Based on comments so far,  I think I'll do some more testing and if it looks to be an issue with the Chessie, upgrade that one and see the results. 

Regarding my electronics experience,  besides the occasional lose wire repair, I forgot to post that I have built a few floor and shelf speaker sets from scratch.

my hopes is to combine these two engines with my CSX dummy and make my "go to" diesel set in my small collection. 

John