Hmm, that's odd... looking at the various crank cases which are just sitting on the floor, it looks like the flywheels are at least an inch clear of the floor, and the heavy flywheels more so (ignoring the one on the SOM base in the foreground). Yet I have a pair of 6/1s which, if they're not on a base, the flywheels are ON the floor - to the point where they can actually be pushed around on their flywheels...
Did Lister use 2 different crank cases for the CS?