Went to Kubota dealer to make arrangements for 50 hour service on my 5030; and while in the computer, the service manager noticed I had a BX1800. He asked if I had the "upgrade" on the seat. When I said no, he told me for $25 I could get the upgraded seat. Ended up leaving the dealer with a new seat and halfway home, I remembered my neighbor had a BX1500 purchased at the same dealer, so I called the service manager back and got one for my neighbor. I installed my seat and it is great. Big difference.