Only sand a slate in one direction.
I like using multiple surfacesHere's the one I use:http://www.sportsmansguide.com/net/cb/quaker-boy-triple-threat-turkey-call.aspx?a=383758 Didn't know that, prob why I struggle with it sometimes Have to experiment a little this spring
I mostly use a mouth call, but the one slate call I do carry is the Lynch Jet Turkey Call. It's really small and makes a sweet soft yelp and nice purrs. It was given to me by the guy that taught me about hunting turkeys, he's been at it over 40 yrs.