Mostly when I have had trouble with pitching the Khufu, it is because I have had the corner guys too tight. The nominally rectangular Khufu in plan really wants to be pitched as a stretched octagon. I think you might be having trouble by trying too hard to pitch the tarp as a rectangle. That would give too short a distance from front (zip) and back midface tie-outs, and the tarp apex too high. That would also would give too narrow a separation of the base of the triangle of poles, DPTE, and bottom chord, hence too high an apex for the limited pole length., So I propose that you pitch the front midface guy and back midface guy further apart, stretching the plan into a fatter octagon (or nominally hexagon, ignoring the effect of the end midface guys)., rather than a rectangle. That would bring the tarp apex lower, and mean that it should accommodate the ordinary length poles and DPTE. In my opinion, the natural shape of these ârectangularâ mids is not a rectangular pyramid at all, but a stretched octagonal (vertex to opposite vertex, not edge to opposite edge) pyramid.
Further, having the corner guys too tight interferes with the canopy assuming the desired hypar shape that sheds wind so effectively, A related problem might be that you are pitching these corner stakes too close in, when they want a bit of space from the perimeter corners. Have the corner guys quite loose at the start, and concentrate on getting the ârightâ overall shape, first by the corners, then by the mid-faces, by gradually tightening the guys. Donât over-tense the tarp.
Unless you have an early prototype or somesuch, the Khufu ought to be perfectly pitchable with regular poles and DPTE.