Greg, dealer says they upgraded the seat recently ... what year is your tractor?
My B2601 was built in May of 2020.
I'm a fit 165lb 33 year old. Mowing our country yard gives me back problems (I kid you not, after 1.5 hours of mowing I get off the tractor with a stiff/sore back).
I'm not a complainer, but I really am in disbelief at the quality of the seat. The original non-swivel seat (I had the tractor for 1.5 months before the backhoe was put on) was passable. But once the swivel seat got put on, it's like the springs on the swivel seat are too weak and you're riding on zero suspension.
BTW I mow with the loader and BH off.
Also - I know the LX gets a nicer seat, I'm not sure if the swivel seat is also different. It's possible the LX/BH seat setup is better than the B.
For me, if I had the choice (I don't think the BH70 has the option), I'd rather have a dedicated BH seat. I don't do a ton of BH work, I'd rather have the primary tractor seat be the intended design and the best it can be. The B2601 swivel seat seems like a poorly engineered "solution". It sits too high because they couldn't do significant modification to lower the seat while still fitting the swivel base in there.