Would you be ok with not using the tie-outs? Cuz if so then I would imagine you could set it up the same way that you would with most other hammocks. I have yet to make my own UQ so my knowledge is limited but would be willing to brainstorm abit and see what we could figure out.
As for the slug. I would recommend starting with 40" of fabric. Drape it over the ridge line and pin it up in a tube until you are satisfied with its circumference. You can just toss all the contents that you plan to leave inside the slug, laying in the hammock and take a piece of cordage and wrap in a spiral pattern from end to end to hold the hammock bunched up against the ridge line while you pin up the slug. If you plan on leaving your TQ and UQ inside the slug then I would make one end of the slug slightly larger than the other for ease of use. Don't forget to add few inches to each end for expansion and end channels. I already made that mistake once with my hammock sock.
Anyways, hope everything works out ok..Can't wait to see the finished product.