Brake reservoir screw head issue

[peterbaron]

How do I test for loose screws ? sit on a sofa, neck muscles as loose as possible, look up ... and bang your head from the left or right with your palm ?

You CAN NOT test for a loose screw yourself , someone else will tell you if you have one.....

You CAN NOT test for a loose screw yourself , someone else will tell you if you have one.....
...loose