Hello,
Thanks both for your useful comments,
firstly the bogies, yes I had seen the cambrian kit, which is a sensible option, the reason I decided ratio is they are more widespread/ more easily available, and they come as a complete kit. However once I know how both bogies are mounted I can draw up to different mounts so it is up to the customer to choose which they fit to the kit. (please note bogies are not supplied with the kit so must be sources separately).
I have now corrected the surfaces of the 3 wagons, and removed the minor faults that I found.
Lastly, thanks for the advise about the couplings and brake wheels, these are just test included on the test prints to see what is possible, if they are too brittle or don't print well I will remove them from the ones I make available.
Thanks again
Wild Boar Fell