The table saw I have is an old CI one, german brand 'MARTIN'
The slot is 20,5mm at the top, 32mm at the bottom and is 12mm high. I have checked the incra site and their mitre bar is 19mm (3/4) wide and 9,5 high (3/ 8), so it should fit.
I'll go ahead and order the incra 1000SE, if it...