I copied these ideas from Colin Ibbotson’s new shelter (see here for some pictures from Andy Howell’s blog). Essentially I’ve mimicked the apex guys and the detatchable guys on the door.
On the door panels, instead of the static lineloks, I’ve added some side release lineloks. I canabalised these from my Laufbursche hip belt pockets (they are also available from ExtremTextil). The advantage of these quick release guys is that it is that both door panels can be secured and that either one can be opened quickly, without having to unhook the guy from the peg.
The reason for using an apex guy is that the structure relies on the door guys to ensure an even tension of the shelter material. Once one or both door panels are undone, the structure “relaxes” and loses its tautness. The apex guy prevents this by ensuring that the back panel remains under tension from the opposite pull of the guy.
Even with the doors secured, the centre pole is more secure at the apex and has less freedom of movement. TBH, you don’t necessarily need to have the double guy arrangement or the side release linelok, you could just secure a single length of cord from the apex loop (either with a karabiner or by tieing it off).
I might experiment with a single length to the side release linelok and with another additional guy to the rear. You don’t need extra pegs either as the additional guys can double up with the exisiting peg out points.