I realised that the chassis was going to get a bit heavy, so I have rigged up a suspension system based on a block and tackle (rated at 300kg, so it will take all but the completed car at 400kg). A sling arrangement allows for 3 degrees of freedom, so I should be able to put the machine at any angle and height.
With limited width, this might help with some assembly tasks. Some other builders have more space, experience and materials than I do, so I am keeping tracks on what others are doing or advising. For example, I am interested in how well sheddingitall.blogspot.co.uk is doing.
I am still fitting and assembling, in preparation for final assembly. For those who are interested in the less than conventional differential design, here are some pictures of the piece.
This shows half the differential and the drive chain wheel. The next picture shows a half shaft with a spur wheel engaging with one pinion mounted in the differential housing. The second pinion engages with the first, but not with the spur wheel which is offset.
The same arrangement is used for the other half shaft, allowing the half shafts to counter-rotate via the two pinions..