Anyway I have done these for now, they are not perfect either, but I like them were I can fit the axle boxes separately, but there is a slight flew with the fixing of them. The bolts are too big. I have used 3mm bolts and nuts, although the threaded bolt is 3mm the head is 5.5mm, so they look huge. I need to alter the holes for them to fit smaller BA bolts.
This is one of the first I printed. It looks a bit plain...
Rather than put each individual design, I have placed them together.
This next photo shows more designs.
This next photo shows the 3rd one with some ironmongery. Which I think looks loads better.
The axle boxes can be any of the designs which I think looks better for the wagon or coach. You have to bare in mind I have very little knowledge of what axle box should be on any particular chassis, but seeing has our line is completely fictional it doesn't really matter I suppose.
Anyway when I have done a body for one of them I will post it up and hopefully the members will like it.

