Yes, it should. The contraption occupies the whole card screen, so after clicking "Stamp", you should delete the contraption to be able to manipulate the image.
If the card is still blank after clicking stamp, make sure that, after placing the contraption, its name is "deckstamp1". To check it, choose the widget editing tool (not the interact one) and double click anywhere in the contraption, then check the "Name". If it has any other name, rename it to "deckstamp1". It should look like this.
I updated the page description to make this clear.