Regarding @rabtech's comment above, he certainly has a point that siphoning out the gas or just driving your Slingshot to get rid of the gas before installing your SC will protect your new SC.
I started adding a can of Sea Foam every month after experiencing stumbling under hard acceleration around 4000 rpm. I added a can of Heet gas line antifreeze and added a can of Sea Foam to every other fill-up over the next month or so and the stumbling went away. It's possible there was no connection between the stumbling problem and the use of the Sea Foam. My personal belief is that I may have had some varnish buildup on the intake to the gas pump in the tank that caused a problem getting enough gas into the pump once I started placing higher demands on the fuel system and the Sea Foam helped clean off enough of the varnish buildup to allow the pump to supply enough fuel. Don't know if that was the case, but I still try to add a can of Sea Foam or its Walmart equivalent every month.