Some letters aren't letters

[Anton]

In the first case (66r) the qo is not an angular 4 shape but looks rather like a rounded shape, like a c with a descending bar. I wonder if there is a distinction between the usual angular q and this more rounded one.

I'm quite sure that there is no difference and, moreover, that that's the exact way of how q is decomposed - namely, into a vertical and a c-like shape with the prolonged lower curl.