The L01 seat has an adjustment, or the L02 does? I assume L01. Worth adjusting that to see if it makes a difference if so.
L01. I know nothing about the L02 other than it’s the latest iteration of the L4701.
The L01 seat suspension consists of a pair of springs. The T handle thing shown in the L4701 OM excerpt above (sorry, I just noticed the “L4701” didn’t show in the page) is a screw jack sort of adjustment that changes the pre-tension on those springs. The heavier the operator, the tighter the pre-tension should be set. So, yes there is some adjustment for the spring action. I’m about 220lb so mine is set quite tight.
IMO the basic issue with the seat suspension is there’s very little travel so it has a tendency to bottom out more easily than the Fords, Longs, IHs, Deeres, and Masseys I’ve operated in the past.
If I could get a moderate improvement for $250 or less, I’d probably do it. $500 or more, definitely not even if it made it ride like a cloud. Hopefully that explains how much it actually bothers me. If I REALLY hated it or it was causing me physical problems, I’d be looking into a Grammer air ride even if I had to make significant modifications to mount it.