Thanks to an attentive customer we've had to make a correction to the Hi Vise instructions. We spend inordinate amounts of time editing our plans, but evidently not enough. On page 4 we state that the Crisscross arms reside in a mortise that's 7/8" deep. But page 1 of the plans show the mortises as 1" deep.
The correct figure is 7/8" deep.
We're working on correcting the PDF and will upload it as soon as possible. In the meantime, you can download the corrected page above and print it out if you've already begun your build. If you've already cut your mortises 1" deep, don't fret. The fix is relatively easy. Simply make a 9/16" wide x 1/8" thick shim and glue it into the bottom of the mortise. That will place the bearing plates in the proper location.
EDIT: Corrected plans are now on our Downloads page.