some say a certain classic pricking irons are best prepped right after unboxing. I have heard users sharpening their blanchard irons with sharpening stones after unboxing it. Has anyone heard of this? unfortunately i have once received a 10tpi VB with the last prong slightly bended/nipped.. had to sharpen it to use it, but not because i knew that i had to prep the irons before using them though! Any ideas?