bolt on shifter knob, mod to stock shifter to accept bolt on shift knobs Options

[BadToTheBown]

This may have already been done and I missed it, if so, please disregard.

I have a stock 914 side shifter and a Numeric Racking shift knob I wanted to bring together but the Numeric is a bolt on knob, not like the stock mounting, here's how I put them together:
-found some 7/16" steel rod in my garage scrap metal pile and ran a 7/16" drill a couple inches into shifter handle...The ID of the handle is something like 0.008" under 7/16" (.4375"), so it's easy....

-Using my crappy small lathe, pilot drilled 7/16" rod and then tapped M5-.80 and checked fit to drilled out shifter handle....

-slid 7/16" rod (insert) into shifter handle with some Loctite to just below flush with the shifter handle end and then using existing 4mm hole in my shifter handle, drilled through insert and hammered in an M5 spring roll pin putting the pin into double shear, captivating the insert and ground off the excess of the pin sticking out the other side....

-Then I just had to screw on the shifter knob mount which also hides the role pin and then screwed the knob on, easy peasy...


Hope someone finds this useful...