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I made and sold some of those things once.Yes, you can use the same toolchain and programmer, but you can't use the same firmware, of course.If it will chirp for one minute, it will be found. Use something under 10ms, i found frequencies between 4khz and 4.5khz to be annoying. Also, a very annoying thing is to sweep down from that frequency.
edit: wtf, dude? futurama
I find that handing the phone over to a small child helps to discourage future calls.