If you don't like re-lacing your floor, but want tie down or thwart loops to make strapping easy, just use water knots to make a small loop. On my 143d, I use about 12 of these in the floor for thwarts, Gear straps, and my pacific river bag.
22"-24" tubular webbing per loop is what I recall needing.
These are also great for clipping water bottles or other gear to the frame with carabiners...of course a standard strap will work but who wants the metal for these.
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