Today at my lesson, I told my teacher about the week's struggle with the tryout viola. He mentioned that it seemed to sit up higher than my viola, so after I got home I changed something on the chin rest to make it sit a little lower (thank you, Kreddle!) and voila! a much happier viola, and a much happier violist.
Another thing he mentioned was the the bridge seems too high. This could be why the C string is so ugly and hard to play in higher positions.
And have I mentioned that I strongly dislike Evah Pirazzi strings?