QTR-Quadtone RIP

I'm having the same problem described by others on my Epson 1280, but 
none of the suggested solutions seem to work.

The printer is already on the thick paper setting. Changing to 
bidirectional did not solve the problem.

On my latest print, I got a fine  scrape along both edges using 
Hahenhumule Photo rag duo using bidirectional. I ran a test using the 
Epson settings on the same print and there were no scrapes.

I got quite a noticeable scrape using Epson Velvet Art again using 
bidirectional.

I have had no problem so far using Photo Rag Bright White which is 
only a slightly lighter grade of paper.

And the scrapes on the Photo Rag Duo seem to be inconsistent, while 
several pictures I have printed on the 1280 using QTR have scapes, a 
couple do not and there seems to be no reason why.

Robin