We ran meth injection on the Time Attack Mini through the Aquamist system as Simon described - it worked ok until we had a pickup line in the meth tank split. The failsafe didn't kick in straight away as the flow sensor was still detecting flow, albeit with a lot of air bubbles. Sadly it happened while we were mapping on an airfield doing 8000rpm in 6th gear and we lost the edge of a valve and a piston as the meth flow dropped massively.
We decided that we couldn't trust the solution and chose to sell the hardware and reinvest the money into a better intercooler package.