Good News! Looks like this is a solution (with some caveats).
One can combine the LX Side-by-Side Arm (45-245-026) with our VESA Bracket Adapter (97-759) to hold a monitor weighing up to 40 lbs / 18.2 kg when fitted together properly.
Here are some things to note:
1) We haven't tested with a Wacom 24HD per se, but instead used weights to mimic the load. Once we actually try a 24HD, we'll be able verify which fasteners one needs and absolutely verify performance.
2) The solution does not work "out of the box." At this point you'll either need to make a trip to the hardware store to get four M5 screws with locking nuts, or use a M6 tap to thread holes on the LX arms' VESA plates. The Adapter Kit includes lots of hardware (like spacers, long M4 screws, M6 screws), which will come in handy. Once we threaded the plate holes, everything we needed was in the kit (but remember, we didn't attach to 24HD so not 100% sure if other fasteners wouldn't be needed).
3) You'll need a sturdy desk surface. This solution applies a lot of torque force at the base. Using the Grommet Mount option rather than the Desk Clamp could help a bit if you're unsure of your desk's strength.
4) This isn't an "official" Ergotron solution yet. Think of it as a DIY project. My guess is Ergotron will likely make some minor modifications to kits so it can work "out of the box," and that it will go through a battery of testing to ensure there isn't some unforeseen complication.
I don't see any reason not to do it (it worked better than I expected when I tried it) but that's not the same as Ergotron guaranteeing it, meaning this is still to be considered at your own risk
. I'll post some pictures in the next few days so you get a visual of the construction. If anyone tries it, please report back and share experience. I'll try to answer any questions for installation.