A question was asked whether or not the "template" of the Lorenz strange attractor could have the same topology of the YGB surface, and I said, for typical parameters, the answer is No. See Figure 3 of: https://arxiv.org/pdf/1610.07079.pdf Cut along the midline and glue together the two loose ends, then you have a mobius strip. Repeat: When self-intersecting a mobius strip on an edge, there is a choice between two alternatives. The Lorenz template features an intersection with a point-like join between two cycles. The YGB surface involves a line-like join between two cycles (Try drawing graphs with two T-nodes and two cycles). Is there a chaotic system of ODE's whose attractor template is topologically equivalent to the YGB surface? The other issue is almost-periodic analysis of the Lorenz system, when considered as two joined oscillation disks. Has anything been written on Period Functions? Does this question sound interesting to anyone else? --Brad