Barcus Berry 1460-N12 - Manual (Page 13)

the Fas-Jac through the end block until it is stopped by the nut
threaded onto the body of the Fas-Jac.
6) Measure the length of the exposed Fas-Jac threads visible on
the outside of the guitar; length of exposed threads must meas-
ure at least 1/8”(3.2mm) but not more than 5/32”(4mm). If the
length isn’t correct, push the Fas-Jac back into the guitar until it’s
accessible through the soundhole and adjust the position of the
hex nut on the body of the Fas-Jac. Pull the Fas-Jac back
through the end block and re-measure the length of the exposed
threads. If necessary, repeat this procedure until the proper
length of the threads is exposed through the hole in the end of
the block.
7) Slip the end cap over the rod and screw onto the Fas-Jac until