I have a Baby Mac that had a sectional beam that I converted to a plain beam by pulling the steel pegs out. It is made of 1x2 boards in an x cross section, the way many sectional beams are. I converted it because my sectional warping equipment is upstairs in my studio in the barn, not in the house, where the loom is. Since I did this, I have had consistent problems with tension. I have done several warps of different materials, carefully wound and beamed under tension, as usual, and had tension issues with the edges, which I have not had with any other loom, sectional or plain. I have used paper, sticks, sticks and paper. My suspicion is the problem is that the beam does not support the warp sufficiently. Has anyone else seen this happen? Any other ideas about what the problem is? I have finished several sectional warps without issues.