Dino I also have a VX and wanted to add an aux fuel tank and upgrade suspension with OME coils, struts and shocks. ARB's current spec and price sheet has the following footnote for suspension upgrades to models with KDSS. "Due to the nature of the KDSS, Models fitted with KDSS may experience a characteristic 10mm to 15mm lean to the front right hand side." You haven't stated in your post what brand GVM upgrade you had but if it was OME then the fitter should have brought this to your attention before doing the job.