🚀 go-pugleaf

1. Although it may not be the cause of the problems, it is not usual
to edit the EPS contents in this way. EPS is usually treated as black
box, and its lines untouched. So, while using 

save 
/showpage {} def 
...
restore

is a good (in fact, a necessary) part of working with EPS, it usually
wraps around the whole file.

2. Working with an EPS it is usually considered good practice to also
reset the graphics state as recommended by the EPS specification.

3. You use the sequence:

restore 
%%BeginFeature: 
<</Duplex true /Tumble false>> 
%%EndFeature 
showpage

but that will do nothing.  The line with /Duplex is a parameter
dictionary for setpagedevice, but setpagedevice is missing. So the
dictionary does nothing.  Setpagedevice erases the page so it must
PRECEDE the EPS.

Furthermore, calling setpagedevice may reset the duplex state. Call it
once only.

Aandi Inston