Hey there, David. I second Roland’s advice that the grace note is really the player’s choice. I know that The Flick is really one of the most common notes used in Scottish playing, but that doesn’t mean that a substitution is a bad thing.
I tend to play certain ornamentations which “feel” right, but may not be right for the next player. I use a ton of hammer-ons, even in Texas Style fiddling, and I agree; they are slightly easier to implement.
Thanks for the feedback on the site. A bunch of work went into it, and I’m glad to see folks signing up. Keep up the good work, sir!