I've made a few small revisions to the way I warp my rigid heddle loom. First, for wider warps I'm now using 3 pegs for the continuous warping.
I had my husband secure the pegs into a board which I can then attach with C-clamps to my warping table (an old door he uses as a work bench). Using 3 pegs seems to make for a more even warp while at the same time eliminating the pile up of warp threads that happens when trying to put them all on only one peg.
For this stage of the warping (beaming the warp), I've done away with the heddle blocks and I just clamp the heddle securely with strong clamps.
Then I turned the C-clamps sideways on the board for added weight and let it drag along the table as resistance as I wound on the warp. I liked having the warp ends still looped around the pegs. It really helped to keep things even. At the bottom of this picture you can just see the burgundy coloured vinyl venetian blind slats I use as warp spacers.