Tried search for many mods but couldn't find one that fit on Wacom's pen while still allowed the side rocker switch to be usable.
I found this foam pencil grip at my local stationery shop, they are very cheap and sold in a pack of many colors, but unfortunately, it was too thin for my Wacom Intuos pen, so I try to cut it open and with a little dab of blu-tack to hold it in place, was working perfectly.
This doesn't require any modification on the pen and the side rocker switch still working properly.
After using this for a while I feel that the pen required less gripping force and was reduced my hand strain by some degree. Through this more of individual preference.
