I tried cutting polycarbonate on the weekend and got mountains of workshop glitter everywhere despite my best attempts at holding the vacuum near.
I found this post: [Dust collection without shoe...futile? - #32 by robertbu ] which is working on a solution that would not cost you any x or y but like you I have a Makita and that thread seems to have gone cold.
I am currently prototyping a boot I made for that system for my Makita:
But I’m only at the fitting stage, I still need to test it with chips flying to see if that air exhaust @SupraGuy mentions is a bane or a boon.
I should have some preliminary results this weekend.