Indeed Berrybrook had a Suplex display including the rear suspecnion which was rather interesting. A consultant engineer was there and he was very knowledgeable (Peter) and he told me a few details.
1. The suspension is lighter than the springs they replace although you would never think so.
2. The 4 seater needs a different version as the footwell intrudes into the space thus this will have to be a shorter more compact arrangement. Should be lighter than the normal one whilst saving more weight as the 4 seater has more spring leaves.
3. Certainly the springs and shock absorber look a mighty unit.
4. The arrangement includes a panhard rod, well I got one of those already.

Personally I think this is the way Morgan should go or something like it, time to bury the cart springs.
I was quoted in the order of £3,500 fitted so I'd better start saving and waiting until the 4 seater version is ready.