Out of level tables are just that...out of level...it don't matter what table is being played on...or who built it....so it's NOT a Diamond thing only. Diamond just like Brunswick only builds the tables then sells them, after that fact...the rest is up to the table mechanic that works on the tables.....ALL the tables. Bad slates are bad slates period, and ever table manufacture on earth has delt with them at one time or another...but an out of level table has NOTHING do to with Diamond or Brunswick! Complain to the last table mechanic that worked on the tables!!!
Glen
Both the GC V and Diamonds I play on are regularly worked on by Ernesto Dominguez and his son, Oscar. They are recognized as top flight mechanics. They did wonders with the old Globals in the room. It isn't a table mechanic problem.
Myself and the other players differentiate between the Diamonds as being more or less true. There is only one GC V and no one I know feels it has ever been unlevel. I don't play on the other Brunswicks because they have bigger pockets. There is another room I have played at and also there some of the Diamonds are avoided as having goofy rolls. I don't know who takes care of those but judging from how the leather pockets were installed I would guess the skill level wasn't the best. That's why I don't judge Diamonds by those tables. Otherwise, I can only go by what I see.
As far as the cushion installation I don't think any of the Diamonds I have played on are the newer ones you refer to and I look forward to seeing some.