This is a mount for an Amazon Fire 7 Tablet ($50 on amazon). I've found it much easier to use the OctoRemote app for controlling the printer rather than navigating through the LCD Menu (especially comes in handy when adjusting the z-axis). Plus all of the files on the octoprint server are accessible right from the tablet, ready to print.

The mount clamps onto the spool holder that comes with the Prusa MK3s. It is clamped on with 2 M3 Screws & Nuts (you probably have some left over from you prusa build in the spare parts bag).

To Install:

• Pull nuts into place (using screw pulling technique)
• Thread screws into nuts so they are ready to clamp on spool holder (DO NOT TIGHTEN)
• Remove peg from spool holder
• Slide mount over peg
• Reinstall peg (with mount) back onto spool holder
• Position mount at the angle you prefer
• Tighten down screws to clamp mount in place
• Slide tablet in from the side

To get the tablet ready (I did this before mounting the tablet) -

Install the google play store on your tablet (I used this tutorial):
https://teleread.org/2017/10/14/how-to-add-google-play-to-the-fire-7-fire-hd-8-and-new-fire-hd-10/

Once the play store is installed, search for and install octoremote:
https://play.google.com/store/apps/details?id=com.kabacon.octoremote&hl=en_US&gl=US

After the app is installed, fill in your OctoPrint Server address & API key, and you have control of your printer!!