Amazon Basics Monitor Arm Pivot Stopper

I bought the Amazon Basics Monitor arm https://www.amazon.com/gp/product/B00MIBN16O/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

But the tilt pivot couldn't stay in place because of the weight. 

I designed this crude attempt to stop it from moving. So far so good.

I printed mine in PETG 15% infill. 

Use at your own risk.