I made this awhile back and just got it installed today. I simply filed the hole to fit the lead screw with a round file. It really does help to support the lead screw and helps greatly with the bed falling when the steppers turn off. In conjunction with the Z axis spring spacer I made (https://www.thingiverse.com/thing:3567212) the bed drop is now a non existent problem. I am very happy with the end result. Thanks Mikallus!