Replace the bed springs of the Ender 3 with solid supports which are adjustable to still allow bed levelling, for better heat capability the washers should be PETG or ABS, the rest can be PLA.

MK2 Features a larger Adjuster which can be adjusted with one hand, the new Base locks on to the bed support frame to prevent it turning. The Locating Washer sits on top of the Adjuster and provides necessary clearance to the underside of the bed, the spigot fits into the adjuster. Two additional washer thicknesses are provided to cover a range of bed levels if required but the Locating Washer should suit most standard setups. The standard base is used on three corners, the cable connection corner (rear left) requires the Cable Corner Base, this is compatible with Johnny Whiskey's Ender 3 Cable Chain, if not using a cable chain then use the Cover. https://www.thingiverse.com/thing:2920060

Quantities to print; MK2 Adjuster - to suit Locating Washer Base x 3 Cable Corner Base x 1 {this is the only piece that require supports} Cover x 1 (only if not using cable chains) Locating Washer x 4 (my printer only required the Locating Washer in each corner, the other washers can be printed as needed and combined to achieve the appropriate thickness)

Optional if required Washers-2mm x 4 Washers-5mm x 4

I've left the old adjuster file up for the time being, if all goes well with the locating washer I'll remove it soon. If you already have the older adjuster, you can upgrade it to suit the Locating Washer by just drilling the hole through with an 8mm drill.