I installed an Xecuter 3 on a 1.6 XBOX with the pin-header install. I spent weeks trying to get the chip to make contact with the pin-header without having to push down on the chip itself. I tried to make sure all the pins were the right length and even when I was convinced the pins were all about the same it just wouldn't make a solid connection. I would maybe think that some sort of pad to seat the chip better and reduce the amount of travel. It would be something to think about in future revisions. But regardless, my final solution was to solder the chip in, pin by pin. There was no way it wasn't working after this install.