Hank,
You have several options. The first is to make a entire new insert if you can. I do this with my sears TS. You may have to route and carve the underside of the edge to get it to sit flat.
The second is as you suggested. Firmly clamp a square of plywood that covers the entire top and raise the blade through it. A while back I picked up a 1 foot sq TS at a rummage sale. The insert was missing. My top is a sheet of 1/8 mdf with plastic laminate on both sides. Works like a champ. If the plywood is too thick the fence may have problems.
You have several options. The first is to make a entire new insert if you can. I do this with my sears TS. You may have to route and carve the underside of the edge to get it to sit flat.
The second is as you suggested. Firmly clamp a square of plywood that covers the entire top and raise the blade through it. A while back I picked up a 1 foot sq TS at a rummage sale. The insert was missing. My top is a sheet of 1/8 mdf with plastic laminate on both sides. Works like a champ. If the plywood is too thick the fence may have problems.
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