My poor mans method...
I think this was given to me by another person on the zone but here is my method...
I have a table built with this and I have a pic I am including. Basically I drilled holes in the table top with the router itself so the spacing would be perfect. Each hole was slightly larger than the T-Hat nut.. This is what I call it anyway. It is a nut that has teeth and an internal thread that receives the bolt. This is place under the table and up into the hole. The teeth sink up into the wood of the table to hold it into place. The bolt goes down into it through a .5" by 6" piece of aluminum that has a hole drilled through it on one end larger than the bolt but a few sizes to allow some play.
I put the bolt through the bar on one end the other end of the bar on the project material with safety padding if need be and the bolt gets tightened down to the nut in the bottom of the table. I also can place a bolt in an additional hole and brace the project from the side to there is no lateral movement.
So for the cost of 20 bolts and t-hat nuts and some cheap scrap aluminum I am able to hold down all my projects for very little cost. Is this the best solution - no but certainly a cost effective one!
Coog
Building Stage:[xxxxxxxxxxxxxxxxxxxx] 105%
Finishing Stage:[xxxxxxxxxxxxxxxxxxx-] 95%