I put rounds on my V62 just for a change of scenery and to see the flaws in my technique (they're less forgiving).
That lasted all of about a week...half way through a jam sesh with my friend, I stopped took off those godawful monstrosities and put some flats on again; much better!
Currently I'm using pyramids, because the TI's were at my house when I changed them. I much prefer the TI's. Mine are so old and fragile now that I pretty much never take them off, I did to clean them and treated them like an antiquity. I cleaned them very gently with 3 different rags, going up in 'grits', so rough -> smooth.
On that topic, has anyone noticed that the low E string of Hofner pyramids has a nasty overtone? I stretched the string and made sure to set a solid witness point but no matter what I do, I still get an overtone that is just as loud as the note itself. Did I just get a dud of an E string or is the common with pyramids?
I really want to like pyramids, but I'm a TI man at heart.