Oh she's a beaut, that's for sure. Just holding it makes me feel special, it's just gorgeous, heavy, and wonderfully suited to the task.
I know how the book addiction goes too, she's a hard one to kick...not that one would want to, but the want is strong on many OOP books. I can't even open Denis Behr's archive anymore it always costs me hours and $$$ tracking down OOPs.
I can answer those here to your satisfaction without any issues I believe.
On #1, it indeed does both beautifully, though to belly/concave it requires 2 passes. You can imagine why if you look at the jig itself.
On #2, it can, but to be perfectly honest I've gotten good enough at it using other means (nail files in particular), that while I can use it for SR, it's just easier to do it by other means (practice is key on this) as the number of cards requiring work is small bu comparison to strippers, and the possible positions for different court cards is easy to adjust for without the need of this jig.
In fact, I have a card press I've scored with lines denoting widths and positions for doing SR work as its faster and I can do however many I need at one time. If you're interested in that, look for the classic card press, brass. Out of stock on Penguin at $99, $45 on Amazon last I looked, in stock.
Hope that helped and if you have any questions for offline or this needs clarification I'd be happy to answer em, shoot me a PM my friend!