The Main Chassis Rails
The main chassis rails have now been redesigned to include holes to plug weld and bulkheads to increase the torsional stiffness. the bulkhead are designed to be welded to the sheet though the slots shown. Then the inner cover plate will be plug welded to the outer rail
Thinking about changing the rear structure to Carbon Fiber to reduce the weight and make the structure easier to make as it is becoming too complex to fabricate. This would entail adding overlapping onto the chassis rails to allow bonding and riveting.
Will work on the chassis rear legs next as the ends of the rails may need to change. Planing to unfold the chassis rails and produce a 2d dxf file of the chassis rail parts. These files can be send to the laser cutters from which they can produce the parts.