My pursuit of a perfect Marvin is having some set backs. He's printing with slices missing... I thought perhaps it was a filament problem until I saw the slicing preview.
Mind posting up a factory file? Just go to file > save factory file as and it should save a factory file which will contain the model and process(es) you have setup!
I had a bash at this. The only way I could get my filament length and build time anything like your picture was to use an infill of 0%. This is what mine looks like.