I've got a Corbin that was on the bike when it was purchased. Typical Corbin- rock hard. In spring I bought some of the same materials Rick Mayer uses on his seats to redo my FZ1 seat. Rick builds great seat for the FZ and seems to be the standard for those, unlike for the FJR. After several tries, I finally had a seat I like that can easily do a 250 mile day on a stiffly sprung FZ, AND some leftover materials.
I used some of the discounted 1" pudgee material, cutting it to fit the basic shape of the corbin rider section. Then I bought some black vinyl from a sewing store and a backpack strap and the plastic thingie that keeps it tight. Tina then sewed a cover out of the vinyl and incorporated the strap into the cover.
A 175 mile test ride was great, and a 20 hour, 1100+ miler while 2-up was even better. I never had any trouble with my butt on that ride. Temps ranged from 40 to 90+ and it never got hot or cold. About 600 miles of the 1100 were twisties (hence the long time to cover 1100 miles) and it never slid or moved at all.
Its perfect and any thoughts of buying a custom seat are gone.
total cost: under 15 bucks and an hour of Tina's time
Here is a link for the Pudgee material
https://www.sunmatecushions.com/sopudgee.htm
If you would like a pic, let me know. I don't have any but will take a few if someone is curious.