For Mounting a MGN12 rail on the Y carriage on a Ender 3 to get a very solid bed.
The Rail_bracket is the earlier version Ender 3 with the shifted holes.
The v2 is for getting the bed to swipe the first ozing off.
The v3 is with Centered holes.
2x M5x12mm screws
4x M4x12mm screws
3x M5 Nuts
2x M4 nuts
1x M3 lock nut
4x M3x6mm buttonhead screws
MGN12 330mm (you can buy a 300mm one if you don't care about the swipe)
13x M3x8mm screws (only filled every other hole on the rail)
11x M3 T-nuts (only filled every other hole other hole on the rail)
4x F223ZZ Bearings
2x 625ZZ Bearings
OBS. You do have to move the Z endstop up, you lose about 13-14mm on Z height.
the rail_bracket is a tight fit! remember to make sure it is all the way down.
Text me if you want me to upload the modeling files (made in Fusion 360)
Test model included after the mounting of the rail.