With the loom threaded in blocks in a point twill arrangement, the warps make a pretty pattern going through the jumpers.
Skowronski describes the process of setting up the jumpers for two sets of leno harnesses, but I found the description a bit ambiguous. I tried several interpretations of what I was reading, but I found that I had the most success when I tensioned each harness separately. With the doup harnesses raised through the whole process, I raised all but one of the back or ground harnesses, leaving the one lowered, starting at the back of the castle and moving forward.
In weaving doup leno, the beating takes some getting used to: because of the jumpers, the warp although taut is not held fixed like when it's coming straight off the beam as in regular weaving. It's more like weaving against a warp that is entirely weighted across its width. It bounces, and there's really not much to beat against. So it's sort of easy and gentle, not strenuous, nice summer weaving.