actually the JSON I get from Instagram (by https://github.com/orsifrancesco/instagram-without-api-node) just gives me the images ordered by size.. the first one of the array is always the biggest (but the quality is never amazing)

I believe instagram serves you two different sets of images depending on if you are logged in or not. The “original” resolution can only be seen logged in. I’ll give it a try once a get the time. Thanks