I`ve tried to upload these fotos elsewhere (another site), but will do so here too.
On my Carbatec tablesaw I needed to add this extension made of kitchen cabinet top scrap (40mm thick melamine on particleboard) to enable me to use my new i-box from Incra.
The existing router extension didn`t have a mitre slot in it so turned out to be useless.
Talking of useless, I managed to put the first slot in the wrong place, hence the second installation.
It all works perfectly now.
The Aluminium bar and angle are 6mm thick and very robust to ensure that the table stays flush with the original table.
Hope this helps someone.
Ron in Hobart