Hi daniel117, I see you bought a Schilke 13A4A. I hope it does all you want it to do. I do you hope you tried one first before buying,or at least whom ever you ordered it from has a liberal return policy. You should always try before you buy.Don't buy because someone on the internet said that's exactly the one you should use. I've seen a lot of players who were used to using deeper cups bottom out on extremely shallow cups like on the 13A4A. They wound up owning a $50.00 paperweight.