IIRC, Otter originally felt the Slingshot designers/engineers changed the shim ratios after a Polaris executive drove it and had an unexpected spin-out the test drivers had never experienced. Otter felt the change he made made his Slingshot handle in a manner he was used to. I waited to try driving my Slingshot first and never really felt the need to try Otter's settings.
WARNING - IIRC, some folks felt this was not necessarily a safe mod and that it may introduce unwanted changes to the front suspension. I remember it as an interesting mod, but not one I felt I needed to implement.