Thanks, Scully. I'm glad it is working for you.
But I'm going to reiterate what I said--the LX arm
is not compatible with the 24HD, which weighs something like 35 lbs.
This is what people need to understand: When Ergotron says something is compatible, we're guaranteeing that the arm will function perfectly for five years; we're saying the arm will hold your monitor in its position--suspended above the desktop--for that entire time. Further, over that entire period, we're assuming that you'll move the screen fully up and then fully down through its 13-inch vertical range 10,000 times. And after that 10,000th adjustment, the arm will continue to hold the screen suspended above the desktop.
Put a Cintiq 24HD on an LX arm and you won't even come close to passing that quality test. In fact, I suspect it will sag an inch or two from day one whenever you move it through its motion range.
Now, if you're planning to leave the monitor at rest on a desktop pad for most of the time (as Scully advises), with the arm only assisting in repositioning, then yes, the LX can do that. But that's not the criteria we use to define compatibility. I always encourage users to find new ways to use our products (three cheers for LX + 24HD!), but in this case, doing so will void the warranty on the LX.
UPDATE: MX is reported incompatible with 24HD (see below)--MX has 10 lbs+ capacity above the LX, which puts into perspective the inadequacy of the LX to handle the 24HD. Any Wacom users should be careful if ever considering attaching the 24HD to an LX. The Cintiq 22Hd and below work great, not the 24HD.
UPDATE 2: Looks like we have a solution! See post later in the thread for details.