Vernt, First Option: Purchase one of Plugger's SHAFT LOCKS from Chuck at Indian Nations Detector Sales (a forum sponsor), less than $20!! YOU just Slide It on the END of your
UPPER Shaft, TIGHTEN the Set Screw!! Then Slide your Lower Rod into THAT END of the Upper Shaft,and TIGHTEN the Lower END Tightener, and your done!! Check out
the Pictures on Chuck's Website!!
Second OPtion, DRILL the ENLARGED HOLE Thru to the OTHER SIDE of the UPPER Shaft, it's a 1/4" HOLE!! That way YOU have DOUBLE Holes for the Spring Clip
BUTTON, and Use a RAT TAIL File to ENLARGE your Drilled Hole if necessary!! Personally, I would do BOTH Options, because I have those Shaft Locks on ALL (3) of MY
Aftermarket Straight Shafts, and would NOT be without them!! Hope this HELPS, Les Robinson.