Good, glad it helped. Everything plays a little different but generally you can find the sweet spot higher for purrs and lower for a good breaking yelp. Some guys will keep a high grip a scoot down the middle finger closer to the tip to stiffen the peg for yelps and that works well too once you get the hang of it.
Striker makes a difference too. Some just flat won't purr. Purpleheart is my favorite wood for purring and a longer, or back-end heavier striker helps too.