Customise a Xbox controller

I had a stroke and I have worked on my controller for 12 months and have re-designed it 3 times to get the best result. The four yellow button extensions are made of sugru. The little finger finds more grip on the left hand side. I use the blue extension to play fighting games like Forge. I have used sugru to add grip to a Kontrolfreek extension, to take it on and off easily.