Gravity KSX 2 RD

I give it a couple of stars because this problem may not matter to everyone and othewise the table is solidly built and stable.
The problem is that the table is not uniformly flat, but rather there is a slight rise in the very centre where the table is welded underneath. The rise itself is uniform and follows the full depth of the table. It is very slight, probably less than 0.5mm, but it was enough to make it useless for me as it means that anything which makes contact with this centre part will have a slight wobble.
For my this was a keystep pro, which has a rubber foot at its own centre, meaning that the lift from the table makes it that the side feet alternate contact while playing and you get noticeable movement. If using gear which only has side feet and where any part that would be over the middle of this table is raised then you wouldn't have any problem, and I guess with most gear it would be fine, but really the thing should be uniformly flat so that you can place whatever you want wherever you wish.

I expect this is a factory issue and the same with all units so this will be returned and I won't try another.