I’m interested in this too. I just ordered this Vari Electric Standing Desk (https://www.amazon.com/dp/B089CG1ZQN/ref=cm_sw_r_cp_api_glt_fabc_4VHHCXDB1Z6CKVN89QG8) with purportedly a 50.5” max height, and I’m wondering what monitor arm I might need to use. I was looking at the Ergotron LX series.