Your inability to use a piece of equipment properly is all on you. I will never agree and that is because I play on them all the time, my shop is next to a pool hall I service and I restored all the GC3s, they play great, no one complains about the things you are saying. That's a POOL HALL an no one is saying the stuff you are, its warrant-less, you have no data other than your experience + a small number of others and also your own fault if you damage your cue on a inanimate 1200+ lb pool table.
Why is it I have no issues with these marks from the pockets? I also don't hear many of the claims that you are making from customers of mine?? I have restored over 50 GC's from model 1-4???
https://www.facebook.com/pg/toledopooltables/photos/?tab=albums
Those factory plastic gc3 pockets you have are JUNK. I use aftermarket gc4 pockets, they are rubber and do not leave any marks on anything, cues or balls.
Diamond obviously got their design heavily influenced from the gc3, its not like they sat down and designed a table from scratch. Anyone who has ever built a pool table had some influence from Brunswick, funny I mention that, from my research the first Diamonds had Brunswick Superspeed Cushions on them.
Trent from Toledo