I’m not sure about the benefits or challenges of using cables to increase rigidity. I did, however, modify my LR3 to significantly increase the rigidity using other means.
- Increase # of strut braces (reduce distance between braces)
- Increase width of strut braces (from 15mm to 21mm)
- Use 1" Stainless Steel tubing (0.120" wall thickness)
- Use two layers of 2.5mm aluminum struts (solid except for logo cutout on one layer)
- Use 1/4" aluminum XZ plates
While I didn’t take measurements of flex before and after modifications, I did notice a substantial increase in stiffness from the original pre-modification build.