I too am trying to understand why these two tips within 3 mths have broken down faster than my prior decades of play.How could a LD shaft be harder on a tip than a maple shaft?? Makes no sense at all.
For over 40 yrs I've hand picked the best 10-12 tips from boxes of Le Pros 25 count.
To determine my pics, I've learned too, only use the ones that have the bottoms flat/shiny like chocolate, with no grain, then I tap each one, on the counter for the proper sound.
What I cannot understand logically, but I do by feel.
Is why can you hit a horizontal cue ball, one tip off center with an LD and get no cue ball squirt?
If you hit the same shot with pure maple, you will get a slight squirt, that will gradually increase with swing speed.
The LD shaft that I own...................has no squirt till you get past a certain swing speed.....the ld squirt increase is not gradual like maple.