I can't help generically wondering, if the tips are flat on both sides ... (no matter what brand) whats the difference if you're going to crown the top anyway?
Who knows, someone might post they "play" better upside down, then everyone would buy one and glue them upside down. :smile:
I always figured that after a light sanding, I'd opt for 100% contact between tip and stick. a small concave glazed imprint from a logo that doesn't sand out, doesn't sound so good to me either.
I use the Tiger Emerald tips, they have a letter D it looks like, I don't want that void / contact difference on the glued area although this is what they say to do. I make sure I sand it all the way out, or flip it.