yes, it's possible to take two 20*1 pin male headers and then cut 1 pin of every row.
But I want to avoid soldering at the orinigal print. Found already al solution. I ordered
20x1 female headers with long pins at dipmicro.com. With that I can stack though
the Arduino proto shield. But I should be more elegant if there was 20x2 female
pin header with long pins.