My small-ish Bosch REAXX jobsite table saw has a relatively short arbor. It can handle a full 13/16 inch (okay, 3/4 inch) dado set, but it requires a special part. If you use a dado set wider than 1/2 inch, you must use the special part, which is a hex bolt with a cap-shaped (hat-shaped?) flange around it.
The blade arbor on my saw appears to be solid, with a small threaded hole in the end. If you use a dado stack larger than 1/2 inch, then after you place the stack on the arbor, you omit the outside washer, and screw the special bolt into the hole the end of the arbor. The cap-shaped flange fits over the end of the arbor, and presses in on the dado stack to hold it in place. The special nut-with-cap is used in lieu of the regular washer and outside nut.
I wonder whether it would be possible to do something similar with your saw? Probably not. Drilling a perfect straight hole and tapping the threads won't be easy. If you can, then perhaps that special nut for my saw would work if you drill and tap your arbor to match. The special nut-with-cap comes with the zero clearance insert, Bosch part number TS1006. As far as I know, you can't buy the nut-with-cap part separately. You might be able to make something like it easily enough.
That's just another wild, dumb, useless idea, but it might help stimulate other better ideas from others.