GP 5000 TL - fitting problems

FWIW the four Sector 28s I picked up were special edition BWR (Belgian Waffle Ride) on sale at a pretty deep discount (Excel Sports I believe):

I’m in a fairly large club (~600) and have seen more than my fair share of ride ending sidewall cuts/tears (either on a club ride or on my Strava feed). My first memory was right after getting a road bike and it happened to a buddy on GP 4000 S2s, and it wasn’t his first time. Off the top of my head I’ve had sidewall cuts/tears/blowouts happen on GP4K, Zipp Tangente RT-25, Conti 4-Seasons, Specialized S-Works Turbo Road Tubeless, and Sector 28s. Some I fixed with a boot/dollarbill, and some were ride ending.