I've been doing some research for a screen protector for the touch screen.
This is what I've found so far. It's doesn't specifically list the F90, but it's listed for 12.3 inch screens, and lists every 5 series as compatible, including the M550.
https://www.ebay.com/itm/23409009245...SABEgK1Q_D_BwE
Has anyone gone with a screen protector for the touch screen? Which one did you use? Would love to know anyone's thoughts and opinions.