Norwesterner
OK then Mike, neither of my suggestions are really ideal for propelling stock, especially round sharp curves. Are you having these problems with using tension locks at present?
I suspect the issue may be that you are using couplings attached to the bogies, rather than the coach bodies. You could verify this perhaps by removing all couplings, and trying to push the coaches with just their corridor connections in contact. If this works, you could look at fitting some flexible corridor connections, such as those from MJT or Keen Systems, so the coach corridor connections are kept in permanent contact, and take the load when propelling. Most coupling systems should then work with them provided they aren’t taking the load when the stock is being pushed.
If I remember, Chris P. developed his coupling system as he had particularly tricky reverse curves to propel through.
Paul