Digital BW, The Print

>   Somehow it seems my rollers get "tired"
>and start to less accurately move the paper forward after each head
>return.

I wonder if this might be a lubrication issue?  Squeaking?  Sounds suspicious.



>But then later if I let the printer "cool down" it works
>fine.  In fact I finished my 15 print run of Super A3's finally but
>only doing 2 prints, then resting the printer for an hour or so,
>then 2 again.

My 1160 would intermittently stop dead, right in the middle of a 
print.  Turned out it was the silver platen bar that was needing 
lube.  Could your feed roller bearings need a drop of oil?

Peter