Replacing the linear bearing SCS8UU

Replacing the linear bearing SCS8UU on LM8UU 8 мм or PLA bush
Basic dimensions correspond to the original.
bushings is inserted with force and stay without problems
old design with recessed nuts.
I do not really like.
sometimes cracks and chips with a strong tightening
The new design is less convenient, but safer.
These bearings are working stably and reliably.
I used them on the axes X and Y on several printers
I am using ABS plastic.
The place for the installation bushings, a little