Using a shrink tube on over a SHCS with an Allen wrench is a very cool idea. I'm going to look at one.
I've also done the one with the fuel tubing over the screw, in fact had to do that with a trainer I have (I’m training my 8 old grand daughter) because I’m using an older OS and the throttle screw is hard to get at.
Thanks guys!
Shubova
[8D]