.500 give cracked guides more often than .530 with 3/8 stems
they called giving you a valve job with those big steps a valve job
thank god I had a Serdi
Never head that problem, but I too like thicker guides at the top. Some things that look esthetically pleasing make zero difference, others do. You can manipulate things with angles for the better or worse, depending on the rest of the tract.
