Also, you shouldn't worry about altering skinny jeans. They're actually the best style to alter since unlike bootcut, you don't have to worry about cutting of the flared part. The only thing you have to think about before altering is the wash.
P.S.-Diesel is great for finding shorter inseams. I believe R is a 30 inseam.
Thanks!! What do you mean about the "wash"? I may end up altering some...are certain washes different?