Need info on bow form clamps...

[Dick in Seattle]

Some time back I saw (and thought I'd saved) a pic of a really nice setup where someone used 3 way edge clamps to do the layup on their form. I can't find the pic and I'd like to get more info... like the dimensions of the clamps and how far below the top of the form he drilled his through holes. I have a chance to get a bunch of these clamps today, but just am not sure they will work on my set up. Anyone use these clamps?