Hi Laraine
I have found that if I do Danish vertically, my tension is better than if I do it horizontally. Therefore, if I have a run of horizontals, I use the English method and try to go left to right as again my tension is much better that way round (BTW I am right handed).
After finishing Ehret and holding it up to the light, I can see a run of holes where I finished one page before I started another. Just looking at the piece normally (without the light to the back), I find this join is more apparent on lighter areas than dark. Given this ALL my future pieces will be worked with some kind of overlap on to the next page.
I now work two colums at a time working all the symbols in the first column and all of those from the first that also appear in the second. After the first column is complete I work on columns two and three so the tension is even throughout.
I hope this helps but, with everything in life, try everything and then stick to what works best for you.
Best wishes and
Christine x