in response to a few of the posts.
1. I've made 6 or more (in a couple of sizes) with a variety of jaw types to suit. and use them often. in fact, one is left on my table except when i need the room.
2. I mount to the table in a couple of ways. First, I've milled pockets on both sides of the vise and use my t-bolt hold-downs. Next, I've drilled top to bottom thru the sides and insert a t-bolt into a t-track below.
3. I tram the vise (when it makes a difference) just like I tram a fence (using one of the methods others have written up at length).
Good Luck.