Quality and hardness of the tips will matter for sure.
As Fran pointed out-
LePro haven t been the softest tips- i loved them back in the days but was really gettin pissed because often you had to work on them just too much.
Later i started to press my tips- and that was for about 10 years my way of happiness
this stopped almost any mushrooming.
Nowadays there are some great tips- and some "cheape" low-quality tips.
From Ultra Skil Tips i was really impressed- low cost- and a really good product.
Now i prefer Zan Tips- never had a tip since 2010, that i haven t got to work on after installing. Impressive stuff from Zan.