I think I'll have call them again as I've not had a response.. What was the point of Rebecca giving me her email address if they're not going to reply...
It'll have to wait till after Christmas now..
When I ordered mine, I called and told them I did not need it dished out so much, nor have the seating position moved reward, since I don't have a large ass. She said they would keep the seating position the same as stock, with a smaller dish. Nope, they sent their normal seat. Later they said they would adjust it free of charge because foam replacement was free. I had an issue with severe perineum pain due to the hump in the front and the dish in the back causing me to sit too far into the seat and placing my weight on the perineum. They said they would change out the foam to a slightly softer foam, and flatten the seat. I had to pay shipping though, so after shipping the seat back and paying the price of $80 for shipping due to the concrete the seat pan is made of, I received a nice, fairly flat seat. It looked great. Unfortunately they didn't replace the foam as they said they would. Instead they added softer foam without removing the offending hump, so I simply sunk into the foam and had the same pain.
I later reshaped the seat myself, removing the offending hump, and creating a channel there, as well as adding the slight dish I originally asked for, and the shallow dish they originally agreed to making when I ordered. Much better. Had I to do it over again, I would have simply cut the hump out as soon as I received the original seat, though I would have still been sitting farther back than I want to. Corbin said they couldn't remove the hump, but others have done so successfully.
I liked the original foam, but the shape was horrific, for me, and they knew upfront that their stock shape wouldn't work for me, since I told them. So even if you get in touch with them, it doesn't mean you will actually get any real service.
Good luck. Corbin makes some great seats, but unfortunately their service is ridiculously bad.