Since I used for the first time a pen with a rubber band in the place where you hold it with my fingers I have not switched back to the more traditional design without this feature. So I find the Surface Pro very unpleasant to hold. So, I thought, well, here is a very easy project to do.
First task. To find a pen with the rubber band and the appropriate diameter. An old one did the trick.
The rest is easy. Remove the band cut it to the appropriate side, and put it in your Surface Pro 3 pen. And here is the end result.
I'm a happy camper!