Hello,
Sorry to hear your pain, I totally understand. I had the same issues of the pain affecting other tasks.
I no longer suffer from the pain I had, my solution was to make a conscious effort to change my grip every so often and try as much as possible not to rest my hands on the hypothenar region.
I also got fingerless gloves with generous gel padding in the hypothenar region as well as the base of all the fingers (in the hand region but below the base of the fingers).
I don’t have a place to do a fit. The salesperson at the bike store examined my fit once more and said that in his opinion my setup was correct. He used a special fit app on his iPad, taking video of me riding and then examining various angles.
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