It remains to play gray paint bomb, if one wants to hide all this ...
A misjudged manufacturing economy which in my case costing two stars.
Easy mounting, many screws & bolts to assemble for a strong result.
Forget the wrenches supplied in the package, because after 2, 3 blocks are HS.
Easy to use.
The somewhat short table that the head protrudes slightly but simply adjust the system to a larger size to correct the problem.
I use this article in // a two expensive consultations osteopath.
If you often have trouble on the back (eg after long hours DIY), you find flexibility and relief using this table but beware health is precious, it is important to seek medical advice before using this type of system .