Captured allan bolt locking lever

[Canobi]

Hi. I have to ask, is that a piece of saw-slotted PVC pipe snapped onto your leadscrew? I concocted the exact same thing for when I use my 8" chuck, to keep the saddle away from moving in too close by accident. It does the job, and was quick and easy to make on a table saw.

It certainly is

I put it on when I learned about truing up chuck back plates, it also helped to protect the leadscrew from the cast iron chips.