[wrogers55]

My 300 series Backdraft has just OK seats, but very soft foam and it's easy to bottom out. I'm not a big guy at 165 pounds on a fat day but I needed to find a fix. Mine was simple and an accident.

Strolling through Costco I came upon some kitchen mats, maybe 3'X2', and half an inch thick, made of a very dense foam. Dense enough to stand on and support your weight. So I bought 4 at something like $7 buck each. Cut them to shape for the seat bottom, layered two together, opened up the seat bottom upholstery by pulling the staples, inserted the foam on the bottom of the existing foam, closed it all back up with staples and cover.

The difference is amazing and the foam does not pack down. Zero bottoming. I may be raised up a bit in the seat, really can't tell the difference but the comfort level is greatly improved. Over the winter I went back to the same process and put one layer in the seat back which was much more difficult but well worth it.

Last week our local Costco still had the mats with chickens or ducks printed on them. Foam was the same. Your milage may vary.

Just another idea.