Roadworx 4120B

Budget Jaspers alternative - half price if not even less.
I'm used to putting things together - Jaspers stands take me less than an hour with tweaks - to get everything right and locked in place.
The Roadworx took way much longer - 3 full hours.
And I'm still not happy and need to tweak a few things.
The only way to mount it correctly is to inspect the product photos on this site while mounting and mimic them since the instructions it came with are useless and in tiny, illegible print.
I went to the hard ware store to get extra screws since the 5-sided set of screws don't actually turn - this since the holes they're supposed to fit in are 5 sided too... better believe it.

The measurements of the stand once it's been assembled are a bit off :
it's much wider and deeper than most synths are.
The first two levels are too deep and all levels have empty space on the sides.

There are no extra parts you can buy to make it sturdier - this is a shame - just one extra horizontal bar would make the Roadworx stand more reliable and almost up to snuff with Jaspers.
What Jaspers stands come with that makes them so much sturdier and less accident-prone are the "lock-in" attachments to the horizontal bars - making it almost impossible for the synths to tilt or fall forwards or backwards.
You can buy Jaspers holders and mount them on the Roadworx stand - they share the same diameter size.
You could potentially buy a Jaspers horizontal bar as well - but the lengths are different, so you would have to buy the 150 size and saw it off to compatible length.

Bottom line : decent quality stand considering the low price point.

Complex to set up and has a tendency to rotate under the slightest pressure. I have a M Audio Keystation 88 which barely fits widthways. A Korg Krome a Roland Gaia and a Modal Cobalt8X. The latter is relatively heavy and has a curved front to the underside. The only way possible to keeep this on the Roadworx 4120B is to put velcro strips on the supports and under the keyboard. otherwise it slips off immediately. That in itself is more of an issue with the Modal but this stand won't hold it without assistance.

Secondly I can put this on and tighten the 4 wheels for this row. (2 on the bar and 2 on the supports) as tight as I can and I have strong hands and in 10 minutes the Modal will be pointing downwards. The poles and supports may be strong in themselves but the brackets are next to useless.

Finally you cannot set this and reach synth controls. One of the sets of support is much longer. however 80% of that length goes back behind the pole. In fact the front part of this pair of supports is shorter than the others. Unfortunately you have to use this on the bottom rung as it is too deep to go anywhere else unless you want two metal rods sticking into your wall.

I found a half solution and that was to invert the long poles so they stick a long way forward and use velcro to hold on my keystation. Its not a deep keyboard but just too wide to fit between the poles on the normal brackets. The downside to this is with all the weight forward - the inadequate brackets let it constantly tilt forward especially if I play above pianissimo.

If you have a selection of small light keyboards - this would do the job (maybe). if you have anything substantial - look elsewhere.