Hi guys. Just got a Glock pre - 5knob configuration. So...it only came with one larger nut/washer for the larger than standard volume pot threading and all other pot nuts/washers are missing. I went to the hardware store and could not find the correct size nuts for the other 4 pots. Is this a mess up in manufacturing? the nuts must be between sizes. Any help would be appreciated. *Where can i get these nuts and washers?