I bought two holdfasts from Gramercy, 3/4 inch.
At first they held, as in first two times and then after the pieces would move. Tried different sized pieces small and large all move. Smack the holdfast in place with out holding anything though and it doesn't budge. I have read a lot of ways people have fixed this, and I'm sure it has been covered here, but I would like your opinions on mine before I started possibly messing up my bench.
My bench by the way is made out of laminated 2x4s. I made the top and then took my jack plane to it until both sides were nice and flat. Drilled a couple of 3/4 holes, tested hat they held and then drilled a few more holes and now I'm stuck with a bunch of holes! Oh, and I use two holdfasts per work piece, still moves. Hit piece with chisel and it completely loosens.
So what do you guys think? leather? hardwood sleeves? add more depth to hole, take some depth away? make holes bigger?