At one point, the resale value of my strap collection could have supported a minor kitchen remodel or preferably, a new timepiece. I would guess that the strap culture and secondary market for straps accelerated as Panerai's popularity increased. I would also surmise that the methodologies of "What Color is my Parachute" could be applied to Panerai collectors
As for the blunt knife - this was more a safety concern than a real functional requirement. I would expect that the fine edge of any metal object could support removal of the springbar. Of course, an instrument that is too blunt may not connect well with the springbar connection.
Good luck, and be careful!
Regards,
Peter