I mounted a H3 Aviation Right-Out Dual Halon 2-B-C Model RT-A600 fire extinguisher, which is accessible from beneath the right seat. It is non-rechargeable, and is due to be replaced in 2020. I should have mounted this earlier, but it got left to the last moment, so I mounted it with 10-32 riv-nuts. To keep aluminum shavings from dropping on the fabric below, I did the drilling with a vacuum cleaner sucking right next to the drill bit.
Installing rivnuts, vacuum cleaner picking up aluminum shavings.