I was watching Adam's (Asunsell) video & decided to try & make one for my EX .Being a different saw this is how I went about it .Firstly I drew some pencil cross hairs on the table where the blade goes through .I then cut the piece of wood to go under the hole & fastened it by two small screws through two of the smaller holes that surround the the main blade entry hole,I had to grind the screw heads a bit to make sure they were flush with the table.I then poured a two part metal epoxy into the hole & when nearly set cut it off flush with the table with a razor blade,I then removed the screws & gave it a slight tap under the table with a piece of wood ,the wood came away with the new insert fixed to it.Then only a matter of re installing it & drilling a small hole for the blade .It won't be hard to replace it when it wears out & is a far better system than the playing card I had taped over the hole.Hope this makes sense