Hello. I'm envisioning something that fits on top of a trekking pole that can have an unlimited number of lines tied to it that would be staked out from the center of the shelter at the camper's discretion. Once you stake out the lines the way you want, you would throw your presumably flat tarp over it and stake it out the best you could. The presence of the ropes underneath would add stiffness to the structure that is generally lacking in silnylon structures. This would also help to solve the issue of flat tarps having their highest part at the entrance instead of where people actually need headroom. The fitting would need to have a top surface that would not abrade silnylon fabric. Here is a napkin drawing of what I'm talking about: 
Any ideas? Is anything like this made or sold?
Then simply stake one end down, walk towards the opposite corner holding the pole upright, when the cord is in tension grab the other half of that cord and stake that down. (easier to do with two people but I can manage by myself by giving a tap to the pole handle so that the tip sticks into the ground…) Now do the same with the pre-installed other one or two cords. Will look something like this : 
* 2 lines = square/rectangular pyramid 3 lines = hexagonal pyramid Work on reverse to determine the cord length. So first set the pole up at the height you want, then measure how much cordage you need including knots. BTW, for those that find it difficult eye balling the stake to stake distance, this may help. Again working backwards, first you set it up however you can then remove the pole and bunch up the slack on the guylines. Make a mark there (with a marker) or a simple knot. 
keep doing that every time you take the shelter apart (or get good at eye balling it)
