I am toying with upgrading one of MK3s to an MK3.5. This costs $249 and would replace the electronics board and display.
Any other MK3S owners thinking of this upgrade?
www.prusa3d.com
Any other MK3S owners thinking of this upgrade?

Original Prusa i3 MK3/S/+ to MK3.5 upgrade kit | Original Prusa 3D printers directly from Josef Prusa
MK3.5 upgrade contains the xBuddy board and new LCD, gives your MK3 the new 32-bit electronics, new connectivity options, Prusa Connect support, and also Input Shaper and Pressure Advance for high-speed printing. Nextruder is not included.