I have seen some hand checkering on some duck calls and would love to pick up a set of tools so that I could add some decoration to my calls. I will mostly be checkering trumpet calls, but would most likely expand to other turnings as well. I've heard that to learn the craft, 16 or 18 lpi would be best. I would like to know from some of the folks who checker their calls what they use. 16, 18, 20, even finer yet? My local woodcraft has a set that I believe is 18 lpi, however if I'm going to use a finer pattern, I'd rather just buy that one right off the bat. Any suggestions and tips would be much appreciated.