'yogh' being more or less a cursive 'z' -- the z-thing with the tail of a g hanging down below the line. Yogh is pronounced the same as z-wedge, and is probably actually more correct, just as it's more correct to use esh (the stretched-out 's' that looks like an f without a cross-bar) instead of s-wedge.

Right?

(Delighted by the solution to the affricate problem, by the way -- phonetics vs. phonology. Of course. The business with the palatal stops was driving me bonkers ... which just goes to show that I deserved that C I got in phonetics sophomore year after all. [g])