Yeah man that's a pretty fuckin cool app for "finger-trapping" dyneema line. I've done this technique on dacron and spectra lines on 'chutes, but never any tactical app. Good shit.
I assume you have found finger trap needles for this stuff at Para Gear or wherever. If not, they used to sell inexpensive Delrin needles, with a hollow ass-end, which is threaded, so the line will cork screw in there for pulling through the woven line. In parachute work you would enter and exit at set points, trim and pop tail back inside, and then lock down with a bartack. I would think a three pass "Z" stitch would suffice in this app.
Some will say this is a "Chinese finger trap", which self-tightens and needs no back up. I would disagree. Anything that can fuck up, will fuck up, so I would stitch it in place. Last thing you'd want is to be several klicks into a patrol and your pace beads come loose and fall off. YMMV.