well, that didn't do it. cura doesn't have an adjustment for the offset, i couldn't find how to do it in the gcode, so i re-leveled the bed with a little bit bigger gap, a thicker piece of paper. that thicker piece was more like two pieces of paper that i used before to level the bed. i still got the gills. i'm trying a different type of top/bottom layer pattern right now, also lowered the bed temp down to 60 where i have had 4 or 5 successful prints including one wide one, 280mm wide, but it was narrow in the x direction.