with an incredibly sensitive detonator
I don't get this sensitive part. I worked with lead azide detonators and PETN over the years and never had what I would call a sensitive problem. In fact I used to keep several detonators in my desk drawer in the office, no doubt I would now be considered violating health and safety guidelines. Of course I never kept the PETN or RDX anywhere near a detonator but in a bomb shelter of sorts