Thanks. This sounds easy enough. I was thinking of hammering the wing-nut at its side. I have a feeling that hammering the end of the bolt as you have suggsted should be easier, and I have a 5-pound hammer that I can use. Seem like this is the way to go.
I was thinking of attaching a multiple-angle-jig to my standard home-made cross-cut jig. Then, I can use it to make various degree angle cuts. And I plan to make two hold-downs on that multiple-angle-jig to hold the wood in place while I cut; then I won't have one hand pushing the cross-cut jig, another hand holding on the wood (this just seems too awkward).
Jay Chan