Hello Trevor,
I found the picture bellow via a link on the MLU Forum. It show's, all be it not very clearly, the inside of the wooden body, which seems to be identical to the Matador from what I can see. It would be interesting to see the inside of a steel body to try and work out how it was laid out. Presumably the shell runners etc. would have been similar for both body types though the method of fastening them to the floor would have to be different.
Regards
Mel