Thanks guys - I've got a bonafide 3x redbox.. and to quote from above "when pressure is set properly - almost impossible to overset" ... and nobody lose any sleep on this - just a toolbox kit. It took me a minute but I realized dialing my compressor down to 30 or so psi made all the difference in the world. Rv14a kit in the order queue ... I'm moreover asking the question - if that happens on a REAL piece - what do ya do?.... heh and asking the question "drill the rivets out get another piece start over" is an obvious answer.
...Happy to bear the burden of asking *******ery questions if it helps anybody else. Love the VAF.