This replaces the stock thunbsticks with longer ones. i found the originals to be a bit to short for me. Rather than having seprate extensions, you could just install these. I would use sugru, hot glue, or some kind of rubbery material to add grip to the tops of them. Printing was done at .01 mm, 100% fill, raft and support, printed upright. It may also be possible to print these upside down without support, but I have not attempted this. On a side note, please dont attempt to dissasemble your controller if you do not have the skills to put it back together! Custom buttons and triggers coming soon.