I found this on ttora, and have searched TW wide for info on it not to much so I decided to share this. I am in no way taking resposnibilty for the write up.
With respect to these threads,
I was looking at an inner boot the other day and it came to me. Just cut the 1/2" or so part where the shaft clamp goes off an old boot and save. Slide a new boot on the shaft several inches past the groove. Next slide the old piece to the stock location and clamp or tie wire in place. Be sure to mash any protruding parts of the clamp or tie wire flat. This provides a "stop" that will keep the new boot from sliding back into the groove. Just that simple.
Some pics to come later.
So I cut up an inner boot for a better view of what is going on and wasted my time machining a blingy "boot stop".
The shaft in the pics is just a piece of round stock for illustrative purposes.
Here are two other methods that will do absolutely the SAME thing and they are free. At left is the waste of time, center is a handful of c-clips (tripod retainers) and right is the method I would use in the future, about 3/8" of the original boot end backed up by one tripod c-clip. (c-clip inboard of the boot piece) OEM boot kits come with new clips so just use the old clip for the stop.
Courtesy of terryj5, member of ttora.com
Here is the link to the whole discussion of this boot slide mod.