I use a Nicholson-style bench (my first anything, built from Mike Siemsen's video instructions). I have no vises. I find I often want to hold boards so I can saw parallel to the broad faces. I couldn't come up with a good way to do this other than clamping them to the front apron near one end of the bench and standing to the side so the saw blade was parallel the the front apron. I worked in a small room; with a 6' bench this was barely possible. So I added an apron (with holdfast holes) on the right-hand end of the bench (I'm right-handed) — the apron in effect wraps around the end from the front to the back — and now I fix the boards to the end apron, stand in front of the bench, and saw away.
All the while I kept in mind Rule #4 from Chris Schwarz' excellent book on workbenches: "If your bench appears to be a new design or looks unlike anything built before, chances are your design is flawed."
I fully accept that (and am more interested than bench design than in rules about bench design), but ... what is the flaw? Why don't Nicholson-style benches have wrap-around aprons (afaik)? How are boards held for sawing parallel to the planes of the broad faces on benches that don't have a vise?
Thanks.
—Kirby.