I paid $5 for this thing, some kind of rasp/file?? you can tighten it up by turning the turnbuckle (?) on top.

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Now my semi-roubo bench. I want to add better "clampage" to it. I can't hold my work down solid enough. I would like to turn it into a Nicholson but not sure how.. Any advice would be great. It's 18" w x 8' long and I have about 9" to either side of the legs. It's smooth/flat underneath so maybe mounting an under table vise on the front end by the leg? Then I could drill dog holes in another vertical board and mount that in-between somewhere? or ??
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I hate the little clamp I have on there now, just not much to work with and it feels tinny. I want to take that off and start all over. I'm just practicing some straight cuts and following lines.