CGW is a premiere gunsmith outfit for CZ's. They are more than capable to cut the slide for an optic. I have no idea on lead time but your best bet is to call them and discuss.
Honestly, I'm not sure what you would want to tune on a TS2 variant. If you want to increase the trigger pull weight, then you can get their TS hammer. There isn't much needed on that platform. I run two TSO's and have modified them to improve ergonomics for my large hands and increase the trigger pull weight.
Cheers,
Toby