Is the descent from the ridge to the Tin Cup Creek drainage about the same difficulty?
From the description, once you got on the ridge you could continue west and end up near Tin Cup Lake.
I am interested in doing this because I want to see the Chaffin area and then the Tin Cup area. This way I would go down the Tin Cup Creek trail instead of up since it is a longer hike back to the trailhead. e-mail if you like - firstname.lastname@example.org