There are not a lot of choices,my (W^D) are built to use the Greenwich couplings.The other ones used by 009 modellers are from Bemo,they are a lot "bigger" than the Greenich ones but are pre assembled whereas the Greenich ones are etched and you have to make them up yourself. Whatever couplings you use you MUST use a height gauge,so all couplings are at the same height,the wagons and the loco's.
Thanks for the help! I have looked at the greenwich ones and they do look the best availabe.
Far better than the huge bemo ones!
I do have some cast whitemetal choppers, not sure where i got them from though... wonder if they are anything like the real ones? Its very hard to tell what was used from the available pictures.