Upgrade MK3 to MK3.5S
I got one of the first MK3 and want to upgrade to MK3.5S. As far as i understood I need to first buy the MK3S Upgrade and thant the MK3.5S Kit.
I have a couple of questions:
1) do I have to follow the MK3S Upgrade instructions (incl. printing all parts for MK3s) and fully reassemble the printer before following the MK3.5 instructions or is there a short cut?
2) The Mk3.5S Upgrade page ( https://www.prusa3d.com/en/product/original-prusa-i3-mk3s-to-mk3-5s-upgrade-kit-4/ ) shows two diffrent heatbed Versions:2+3 screws and 2+1 screws. My Heatbed has only one screw (see attached pics). Do I need to replace the heatbead and is it possible with only one screw?
3) If I need to replace the headbet cheaper (buy a used one from ebay or modify the existing one)
