Easy peasy, simple but very functional!
I have been using this one for a few years cobalt. I was just sharing. I had not seen one here. It makes a very comfortable grip is the stick is cut to the right length.Never seem a thumb stick like it ,but like the idea use it a few times and let us know how you get on with it. Its not like a traditional thumb stick so always interested in a different approach.
No reason why it shouldnt be okay ,just a break in tradition which isnt a bad thing