The metal standards flex more than many other metal cameras if you grab them and push/pull. I haven't had any problem with them moving out of position nor any problem with wind. I understand that the DLC was redesigned to become the DLC-2 because the locking mechanism was too often over-tightened.
I also picked up a wooden Canham 8x10. The previous owner apparently had problems with the rear standard. He had put extra screws into it and epoxied it turning it into a fixed standard. Keith Canham put it back into essentially like new condition for, I believe, less than $200. My 8x10 does have noticeably more flex than either my DLC45 or MQC57. The swing mechanism on the rear standard seems to be the weak point on the wooden 8x10.
My experience has been that the MQC57 doesn't have any problems with rigidity, even though you can flex the standards. Because of the smaller size, I believe the DLC would be even better (I use my MQ57 more than my DLC45, so I can't say I've seen every possible weakness in the DLC). If you were working in a studio pushing film holders quickly in and out, you might be more comfortable with a heavy Sinar or Linhof. If you are carrying it very far and making careful use of the film you are carrying, I don't see any advantage in using a heavier camera. The design of the metal Canham cameras makes them very easy to use for a wide range of focal-length lenses without swapping out the bellow or adding extension rails.
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