Super Chromonica Deluxe Mouth Piece (round holes)

I replaced the mouth pieces on two of my super chromonica harps with round hole mouth pieces used on the 270 deluxe. Playing with the square hole mouth pieces was like rubbing a cheese grater on your lips. Lots of irritation. The round hole mouth pieces have no drag and I think they make a better seal aginst your lips. It made a big improvement on my 270 super chromonicas. I also have a 280c chromonica, so I knew the round holes were better. From now on I will buy the 270 deluxe harps. I have been playing since I was five. Just figured the chromonicas out during the last two years. Now I like them best of all. Thanks for making great products.