If you keep your guylines attached to the rainfly and use small cordage (1 mm to 2.5 mm), these things are pretty slick. Very small, very light weight (0.02 oz / 0.7 g), and super easy to adjust.
Clamcleat CL266 Mini Line-Lok
MIcro Lineloc.jpg
I've not tried them with Lash-It/Zing-It. I know Zpacks has them (Micro Lineloc). Probably others as well.
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