I know they are expensive but a Disco specific diagnostic tool like a Nonocom or similar is invaluable. Combined with Dr Google, this will help greatly in anything you might encounter on your travels. I had a simple EAS fault (faulty ride height sensor) that resulted in me getting an $$$ ride on a flatbed from Gundagai back to Sydney. If I knew then what I know now about my D3, I could have got myself out of trouble. I have the GEO kit sitting in my shed that I still need to fit. It’s made up of standard industrial pneumatic fittings.