Agreed Rail Rider and dr5euss,
My thinking was as follows.
The fixed coaches can be set at any height the kadee or roco coupler works within the fixed rake. Easy job.
If i have Kadee on locos then they all have to be set at the correct guauge height. Then the front and end of each rake has to be set at the correct height. Then the kadee on the brake vans has to be set at the correct height.
Not so easy or fun!
Now Kadee USA have no idea what Hornbys NEM socket height is. I have chatted with their USA technical Dept (Sandy, I think, who has some Hornby models!): about a a 'step down', my term, NEM Kadee for Hornby Bachman oo, they suggested in return the possiblity of a NEM oo kadee with a longer pin.
My thinking is that we will not get either; because their is no standard Hornby Bachman NEM socket height even on new releases- I really do not Know though as I cannot check all new models. But I/we have to get on with something.
So I was thinking as above - Smiths on buffer beam of locos and vans and freight and end of coaches - pretty easy-
Hence my interest - This is blown out of the water of course if Smiths are a bugger to use.... see above.
Good discussion here