Yup nuisance like that aren't they ;-)
(still with prescription prices, its cheaper to buy your own whisky if doing it by the tot!)
I probably over drew it a bit by using 4x2 anyway - still depends on how chunky your door I suppose.
wedged tenons as well by the way).
I note lots of commercial frames, don't seem to bother with the haunches these days - I presume because that would be another machining operation after running the ends of the jambs past the spindle moulder to profile the tenon?
Anyway, I have had a fiddle:
Anything else worth adding?