RE: Purring
Best thing is to get a good hard purr like Campo just described. Once you get the "feel" then you be able to slowly develop a softer purr with different tones.
I sat watching TV and "gargled" while fluttering my tongue. I just did this and didn't try to make a purr with the call. The call at first just kind of got in the waybut all of sudden I'm sitting thereand realized that I was getting used to doing those with the call in my mouth. ThenI realizedI was actually starting to purr with the call itself.
Don't know if that makes sense or not. Good luck......