G'Day Pennywhistling Mudcats...

It's another question from the ignorant but ever-curious neophyte whistler...

Being "paper-trained" I learned to tongue every note except those connected by slurs. Robin Williamson's book addresses slurring as a phrasing technique. At this point in my whistling career, I tongue most everything except when slurring seems to make for a smooth phrase, regardless of what the music says. Also, I find my pitch is more consistent if I tongue than if I slur...

However, I have recently had the opportunity to listen closely to other whistlers, and I find some of them seem to slur everything, only tonguing occasionally. Others tongue more frequently, but still a lot less than I do.

SO....how much do you tongue or slur notes when you whistle?
OR....how much should I tongue or slur notes when I whistle?

All thoughts appreciated--I'm off to browse other whistle threads here and Chiff 'n' Fipple to see what else I can find out...

Thanks for all insights and advice!!!

V