Modify Anet A8 frame

Modification of the frame for Anet A8 with a seat for a 22x8 bearing with an 8 mm hole for the threaded bar and the seat for the smooth pressure bar, so it does not move anymore during printing, look on my profile for the modification for the part lower, you have to get the bearing, the smooth bar should be pushed in. To make it easier, fix the rectangular holes and go over the bearing seat with sandpaper, printed as the file is done by enabling the supports for parts in contact with the bed, serves for the bearing seat.