I thought l/y pairing was already included at least in pfeaster's summary of the curve-line system? I don't remember the history of curve-line systems very well, but I think I remember l/y mentioned somewhere.
As for qo/t/p, this is an interesting and new pairing for me, it appears to match nicely with a recent discussion here, regarding the first q in the MS (in the present order of pages): You are not allowed to view links. Register or Login to view.
As for qo/t/p, this is an interesting and new pairing for me, it appears to match nicely with a recent discussion here, regarding the first q in the MS (in the present order of pages): You are not allowed to view links. Register or Login to view.