A big addition on all my bikes have been highway pegs.
Just being to change leg position periodically helps my knees tremendously.
You'll need the dresser bars to mount them to.
https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=longhorn+pegs&_sacat=0

The ride may be fun, but in the Great Scheme of things, it really is about the destination! John 3:16