The supported microphone and shock mount/clip weight for the PSA1 ranges from 700g (1.5lb) to 1.1kg (2.4lb).
If your microphone setup on the PSA1 weighs more than 1.1kg, you have the option to loosen the top and middle screws on the PSA1 to test its stability.
On the other hand, if your microphone setup on the PSA1 weighs less than 700g, you can try tightening the top and middle screws on the PSA1 for a secure hold.