I rigged my shift boot up similar but put electrical tape around the shifter first, then zip tied around. Give the zip tie something to bite into. Hasn't slid down in over 5 years.
Man this knob makes my old knob look like a marble. Really changes the feel of driving. It's big, but doesn't feel too big. And the coating looks thick. We'll see how it holds up in the years to come. When I got my Twm off and in the house the finish wore down to almost a mirror finish but stayed colored around the base. I put a lot of miles on that knob though.
Anarchy motive knobs give you a reason to drive. Thanks again Best.
I now drive a Japanese Ford.