Mounting two HP LP2475w monitors to a dual monitor stand: Still use Quick Release plates?

I have owned one HP LP2475w for a few years and like it so much I bought another one (refurbished).
I have been using two screens for many years, but decided to get a VESA-compatible stand that supports both.
After a lot of searching I settled on this Planar:
http://www.newegg.com/Product/Product.aspx?Item=N82E16824995006
When I mount these screens to the Planar, should I remove them from the Quick Release plates and mount those to the Planar stand?
I'm unclear as to whether the Quick Release plates would still be used in this scenario.
Thanks for any advice anyone can provide.
dg
This question was solved.
View Solution.

Please see page 17 of the HP LP2275w and LP2475w LCD Monitors User Guide. Based on the information presented in this guide, you can either mount the monitors directly to the stand or you can mount the "Quick Release Plates" to the stand and attach the monitors to the plates. Both methods are supported with this setup, however I would suggest using the plates for the convenience they provide.
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Fix: http://pastebin.com/FFDbubw9
Undo: http://pastebin.com/zA8CJY06
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(P.P.S. The screen fade that happens when you log in/out is just as choppy as before (or if it wasn't choppy for you, that shouldn't have changed). Oh well, how often do we see that thing, anyway? :))
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The long version:
Well... I was able to do one more thing.
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So this isn't a solution, but it does help. I am still uncertain of where the problem lies, considering GPU-Z shows graphics card loads to be as low as always when it's happening.
Oh, and I found one more registry value. This one is far more important. :) It solves the problem for me entirely, from what I can tell.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Avalon.Graphics
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