This might sound odd but have you tried giving real thought to simply relaxing more when riding? Rigid tends to make people grip the bars harder and even when you think you aren't, it can take some conscious thinking to make to loosen your grip ... it's also quite counter-intuitive especially on rougher sections.

I also swapped from similar bar (Geoff) to OG. The extra rise defo helped me, but man with Ergon GP2s this is my comfiest set up ever.

Tried the similar but wider Kyote too. Nah, too wide.

I ride my rigids like stu. The bars "floating" in my hands, barely any grip.
I have alloy and carbon bars on various bikes,seems to work ok to reduce numbness and fatigue regardless of bar or fork material.

Have heard good reports on revgrips? Very expensive, £60-100.
But claimed to float on the bars to reduce vibration.

Cyclepeasant wrote: ↑Wed Apr 14, 2021 10:55 pm Have heard good reports on revgrips? Very expensive, £60-100.
But claimed to float on the bars to reduce vibration.

I'll make you some Axxios stickers for a tenner each.