That's excellent news, very happy for you.I've just returned from the upholstery dude and my seat is now awesome. He dismantled the seat and added 1 inch of dense foam to the top of the seat and he added an inch to the underside of the seat. I was amazed at how little foam was used at the factory and the quality of the foam was poor. Also, the underside of the seat is probably about 50% plastic and no springs what so ever. Not impressed to say the least.
It took him 1 hour including removing and replacing the seat and he wanted 30 bucks I gave him 50$ so I could sleep tonight. AND most importantly "my wife loves it" too >
Hopefully others with seat issues will take encouraging note and seek out their local upholstery dude, too. IMHO you got a great deal (kudos for the 'value added tip' you paid) but still I think folks might be surprised at how little it can cost to get a bit of similar 'custom cushioning' work done.