Has anyone ever used something like these, the LiteLine Mini LineLocks? I was thinking you could permanently tie one end to a ridgeline tieout, and then wrap the other end around a tree and then through the LineLock. Don't tie the single overhand knot to stop the line from pulling through so you can quickly insert it and remove it when packing up or setting up. Seems easy and lightweight? Avoid the weight of Prussiks (miniscule, I know), S-biners, Nite-ize Knot Bones, Tensioners, etc.
These ones are also sized to use with a 1.5mm spectra line, which may be fractionally lighter than Zing-it etc (not sure though).
Check it out: