This part makes it possible to mount an MKS Gen 1.4 where the stock GT2560 would go on a Geeetech i3. I'm using an i3 Pro B, but this would probably work on other similar GeeeTech printers. If it does, please mention it in the comments to let others know!
I've designed this part to accept M3 thermoset inserts in the outermost holes, but it could also be modified to use self tapping screws instead. This part mounts to the original mounting holes using M3 hardware and the board mounts to the front of the adapter using M3 screws in the threaded inserts.
I used M3 * 15mm Hex head cap screws, washers and M3 nuts to mount the adapter to the printer and some motherboard mounting screws to mount the board to the adapter.