Hey Joe,
Veevus 30d GSP is half the price for a 50%+ larger spool than semperfli nano. Same traits as any other gsp, including being stronger than you'd ever need.
Uni 17/0 wraps so thin and flat ("flossy") that it appears to melt onto the shank. Not very strong but serviceable. Not slick, so grabs materials (including dubbing) well. Here it is on a #18 parachute in progress: