Replacing Dishwasher Gaskets

[Vmstek]

I have a 20+year old JennAir JDB1250AWS dishwasher.
It runs very quiet, but while recently pulling it apart to clean out the filters, I see the large circular gasket (#10 in diagram) is showing it's age...getting soft and distorted,
While most of the parts have been discontinued, I purchased a gasket set a while ago.

How do I replace the #10 gasket? Is this serviceable from inside the dishwasher...just pull off/press in?
Or does the unit have to be pulled out and work from the underside?

 

[Twowaxhack]

You could probably buy all the parts but is it worth it ? I just replaced a 25 yr old GE profile that was worn out with a $800 out the door Bosch 300 model. Holds 1/3 more dishes and is more energy efficient. Stainless steel interior and took 30 minutes to install because of how friendly it’s designed.