This time, the project mirrors real life. The CBA was a variation of the HAA coal hopper. Although built to CBA spec. from new and not converted, the model would be a converted HAA.
I must point out at this stage that I used the old Hornby version of the HAA. This model has since been significantly updated and would have been a much better starting point. As I did this project over 20 years ago, I had no option.
No scratch building or moulding this time as Appleby Models did the tops to convert the HAA to a CBA. I purchased four and the project started. At this point I have to say that I do not think the conversion kit is available anymore.
The kit was very well designed and went together well with the Hornby Hopper. Plenty of photographs were available and I noted just how dirty and discoloured the prototype was.
I was considering making a prototype top for myself, so that I can increase my rake to a more prototypical set. Sadly this is now firmly on the back burner, but you never know!