Nice DIY job. The only advantage I can see to two windtech clamps is the center of gravity is closer to the stand and may make the stand a bit less likely to tip when fully extended. If you have the stand staked, then no worries.
I agree with keeping the center of gravity when running on a stand.
I bulit this bar to used exclusively stage lip, on-stage.....
or clamped to a balcony or pipe.
The only exception would be to counter balance it with another set of mics like this......
I need to build a new bar to space the mics a little better with the screens, as you can see in the clamp picture.