I'm disappointed in the performance of a makeshift #crochet with my pull saws for ripping wood. Without a wedge and a clamp, there's not enough material to hold a workpiece.
Tried with a small piece that can turn on an axis: A board could be fastened in another place and that might help.
Still I wonder what low roman #workbenches might have used to hold a board for ripping so that its thickness is halved?