That's not what you told me. :grin-square:
Actually Jay, I respectfully disagree with this. When I bought my "4" I was choosing between a 3 or a 4. I did some research and one of the reasons I went with the GC4 was on input from RKC. I asked him straight up which was the better table and he said the the GC4.
His major problem with the 4 was what he considered a design flaw in the frame that could potentially result in slate sag at the head and foot ends. Perhaps this is what you meant by "weakest". Obviously this could be a huge issue, especially from a mechanic's perspective, but RKC devised a simple and cheap fix for this that eliminates the problem. He has a thread on here somewhere that explains the mod with pics included. Of course, Donny (SD Billiards) performed this modification to my table when he built it. :thumbup2: So as far as I'm concerned, this is a non-issue.
Some of the earlier GC's (the 2 and 3 maybe?) were available with a less expensive slate substitute. Buyer beware.
In regard to the OP, inspect the castings on any GC4 you may be looking to buy, especially if they are the bronze ones. These had a tendency to pit or corrode over time. Mine were pretty beat up but I took care of that with a relatively inexpensive trip to the powder coaters (about $100 - $150, and I get to choose whatever color I wanted).
Also, I believe the GC4 (and the GC5 maybe) were available with less expensive 3/4" slate in addition to the standard 1". Check this on any table you are considering.
BTW, I wouldn't put too much emphasis on how many pro tournaments or tours use what table. Just like players that compete with Cuetec's, at the pro level they will often use which ever table will pay them more to sponsor the events or whichever company provides a less expensive deal in providing the tables. I've seen pro events on Olhausens, Connelly's and whatever else. Similarly, you will see events sponsored by Brunswick where they are not even playing on a GC because Brunswick wanted to get exposure for it's "furniture" line. I would say the increased use of Diamond tables in pro events has more to do with the support Diamond has provided (which is a good thing by the way). But I would suggest that if Brunswick or Olhausen offered a better deal to the promoter you would see the event played on that equipment instead.