The best thing is, go to a piercing studio - what I know the chip is a bit bigger - they have the needles in the studio. The chip is steril. I went with the chip to a piercing studio.
I’m also a waiting to use it, because the daytickets from the visitor terrace from the airport use this system. I hope that they will offer season tickets soon (at the moment only barcode - so i don’t bought the season ticket)
I don’T know a writer, but I think the proxmark can help.