Can't I just clamp the rail in a vise to do the same thing?

You can. Rail can be clamped into the top of a vise on the base to allow the base to be filed. However, this is a very fiddly process. The rail will tend to pop out of the vise, especially on the smaller sizes. The StockAid tool solves this problem by holding the rail completely inside a groove while being files.

Did you find this article helpful?