I am scared reworking 4742 as the file would not pass by today's reviews. 
Overlaps and edge lines across faces...
Last time I touched something like this, I reworked nearly all ZNAP parts..
Part is on tracker: https://library.ldraw.org/tracker/37356

Overlaps and edge lines across faces...
Last time I touched something like this, I reworked nearly all ZNAP parts..

Part is on tracker: https://library.ldraw.org/tracker/37356