I have a question about upgrading modems

I have the RM520 and thinking about upgrading to RM551E-GL or should I wait tell the X80 comes out?

Do we the Instructions for the installations somewhere?

Where can I find the updated drivers and Updated CPE Interface

Thank you all for your time

Dear @Homefront
Sorry, I didn’t get your point. What is the Instructions for the installations?
For windows drivers and windows update tool, you can download from website below: