I searched but didn’t find a thread on this. How do I cut a C natural on a D whistle? I play C natural O-X-X-O-O-O. I’m trying to cut by tapping with T3 (B) but I’m not sure if that’s the best approach (and it just doesn’t sound right on the flute). Any wisdom appreciated, thanks.
John
It’s do-able as you describe with due practice, but is much easier if you only have to tap one finger. On flute play your C nat oxo xxx and tap L3. On whistle that may also serve but oxx xox is usually a better C and you just tap R2 to get the ‘cut’ to D above. See the Sullane Jig video clip in my signature for extension of this to rolls.
Yeah, but a tap is not a cut. 
Jem’s technique certainly works. Since I almost never use oxxxox for C … when I cut, if I cut, I just tap all 3 fingers of the bottom hand. If anchoring the C with B3 oxxoox, I just tap B1 and B2. Gotta synchronize all 3 (or 2) fingers, but it’s not that hard.
And simpler still, I usually don’t cut (or roll) C-nat. 
If one defines a “cut” as being a gracenote above the melody note, then it’s done on C natural by playing a D gracenote like this:
oxx oox (that’s how I finger C natural anyhow)
oxx xxx
oxx oox
So the finger action is a “patting” action (the two lowerhand raised fingers patting as one), but the result is a “cut”.
And the C natural roll is
oxx oox
oxx xxx
oxx oox
xxx oox
oxx oox
produced by two “pats”, the first creating a D “cut” and the second creating a G “pat”.