Why not get the Virpil ones? Way cheaper, and extremely well made. Not taking away from Monster Tech - they look to be an epic product,, but damn, the pricing difference...
i have a couple of those. if anyone wants one of them (or both) just give me a heads up, i'll give them away if you can take care of the shipment (no idea how much that could be, i'm in spain and they are heavy). they are now just unwieldy pieces of metal taking up space in my closet. note that they are for mongoost50 (other devices need adapter plates available from virpil) and are the first version (the current v2 ones are a bit angled).
they are actually fine and dandy but i ended up getting a monstertech stand anyway. this is way more straightforward, specially if you use pedals. the problem of desk mounts is that you can't really do anything else with that desk unless you take them off, and i got tired of all the mounting/dismounting. a stand with everything bolted on is just easier to shove in front of the desk. but in time even that got too unwieldy and i finally set everything up behind 'me' in a corner and it's now resident there, if i want to fly i just have to turn around my chair, put the headset on and i'm in the cockpit, it can't get better.
wait, it can. for now i just have to put the keyboard in my lap and the mouse on the armrest

it sort of works for the litttle (but critical) use of m&kb i do, but i plan to just mount some simple shelf on top of the stand.
Moral of the story? Drink beer, improve your business!
cheers!