First off, NO, its not a Warmoth... I have a body that has a wide neck hell pocket and there is a space between the neck and the side of the pocket on the low side.. Now Ive leaned how to shim necks,but Ive not encountered a situation yet where I need to shim the side of the neck. What do I use? Somenone did tell me to use bbrass plumbers screen to make sure the shim didnt slip.