There were things to work out to be sure, but the bottom line is that Honeywell wasn't going to do it..and without Honeywell, forget it.. in any case, the MQ series sensors (or others) are the real key.. detecting gas where it should not be.. (eg basement)
Btw, I offered the design free.. as well as further work. It was never about money.
Was bitter and quite depressed for some time.
For my own well being, I left the project behind..