The road to success is always under construction.
I made long soft shackles with the same lash-it and put a couple extra wraps on a Klemheist. You don't need any hardware this way.
I splice continuous loops or soft shackles out of 1.2 mm Tech Line from DIY Gear Supply, then prussik them on a tarp ridgeline made from 1.9 mm Tech Line. DIY Gear Supply says that the 1.2 mm line is "not recommended for splicing projects." But I haven't had any trouble splicing it.
The Tech Line prussiks might slip a bit when they are new, but they grip better once they are broken in. I find that they grip fine with 3-4 wraps. For whatever reason, I have never been able to make klemheists work.
Good option Mouseskowitz, I hadn't thought of that. I've only used klemheists as prusik replacements for webbing. All I care is that my loop holds under load and cleans w/o fuss. I'll of course give both a try.
What about using #36 bank line for the prusik knot on Zingit line? would the tared line hold better than Zingit on Zingit?
Bank twine, seine twine, mason twine....all the same stuff. Some is twisted, some is braided, some tarred. I use un-tarred, braided mason twine for prusic loops. Works fine, and the price is right. It holds knots tenaciously, btw. Tangles, too.
It may not be rocket science, but it's still science.
I still use the Prussics i originally put together out of Braided Mason line too, even on my Dutchware RL. A few extra turns and they grab.
Double fishermans knots on the BML.