I think there is a natural law of the universe that states that all power tool dust ports must be a unique size and must never fit your existing hoses.

At least that has been my experience. I've had to cobble together adapters for my dewalt miter saw, an old bosch ros, a makita track saw, a bosch router vacuum attachment, a bosch jigsaw vacuum attachment, and one for my festool tools. I really wish there were just a couple of standard sizes that every manufacturer would use.

So good luck.

If you have the funds, you could buy a festool sander. They don't expel any dust in my experience.