That link has some great ideas and information. I have one of the new cold fire systems from Speedway. It is different in that it is not like some systems that direct the nozzles to the fire, but rather soak the driver, so my nozzle is routed to the roll bar directly above the seat. there is a sensor tube that sets off the system once it reaches a certain temperature or is penetrated. It can also be set off manually by the driver. Since my bottle is mounted in the trunk, the sensor tube is close to the fuel cell and also routed up to the firewall. This way, it will be set off by a fire in the back or the front. Thankfully I haven't had to use it yet, but I did have a triple flip at the end of the season last year and the bottle did not come loose in the crash. Hope this helps.
