Perhaps this is only a problem when you have somewhat heavy devices in the top portion

And, in fact, although it's new, it is exactly that: something that has to be tied together to make it work right!I'm guessing that if I took out the heaviest 2 devices in the top portion, which would leave in only a 1U (one space) device and a 2U device, it would hold in place

I would never expect that top portion to be able to handle anything truly heavy, such as an amplifier or UPS (uninterruptable power supply)!!

But then, you don't buy something like this only to use a mere 3 of the 10 spaces in the top portion!

In sum, the "stars" lost in my review rating are due to: (1) holes requiring serious drilling to make the device possible to assemble (& some people might not even have a drill, or might not have strong enough metal bits), (2) a very minor "partial star" deduction for lack of assembly instructions that some people would need (but that aren't necessary if you're good with that kind of stuff), (3) mounting holes that won't allow me to use most of the rack-mount screws I have that work just fine in any other 19" rack/case I have, and (4) a tilting top portion that refuses to allow me to make it stay in place, at least when it's more top-heavy than bottom-heavy

And yet, no matter how much I torque down the two knobs as well as the 2 screws at the pivot point of the top slanted portion, it refuses to go down in its lower position (most slanted to the front direction), instead insisting on moving into a more flat position although not completely flat