So I'm done with this, bored, mind's eye ideas expunged.
Adding 2 guys per side, total of 4 guys total adds little weight and is really simple. Video shows the 2 guy per side option, and shows the more complicated 3 guys per side option.
Here the Notch is pitched as close to the ground as possible because you're guying for windy conditions presumably right? If it aint windy, you don't need the guys...? Well no, I think you should guy it anyway because the additional pegs on the guys reduce the forces on the 4 pegs near the fly so they don't tend to drift out the ground, if they do drift out they've weakened the soil there, so I think even if not windy, you should always add these guys just to help keep the tent tight and reduce flap anyway.
This system is adding probably about 20g of Dyneema and about 40g of pegs so 60g added to a 700g shelter. Hardly heavy!
This is a method I invented to get 3 guys, 2 external two internal.
Complicated, is an exercise in origami and physics but someone might build on the idea and improve it. This would add say 40g of Dyneema and 80g of pegs for 120g added, for total of 10 pegs.
If someone, I guess TT, want to offer guys attached to the Notch, then I think they will need to be right on the apex so they are pulling with the line of the fabric and not off the the fabric, less stress on the stitching, and it would benefit from an external reinforcer to spread the force so it doesn't pull the apex stitching apart. My 2cents. Til then I trust the pole attachments.
The last thing I need to do is get some more sliplocks, because of the Silnylon damp sagging solution of adjusting the trekking pole length. After I got all the tent tight, the Dyneema won't stretch but the Silnylon will so I can't just push up the pole to tighten Silnylon from inside the tent, I have to loosen up the guys. A clever solution would be put those sliplocks right up near the pole so you can reach them from inside, so you'd slacken the guys, push up the pole, tighten the guys.
I'm done, any ideas to build on mine welcome.
Next problem is a storm flap for the vent... so I'm *almost* done :)