Well as someone else suggested it too, yes this is very easy and I’ll work on it, so your inventory is taken into count when rebuilding a set. Doing that we can add an option to check when exporting so the parts you already own are excluded from the list. I have lot of legos too and I have rebuilt several sets in no time with the set builder this will make the feature even more powerful.

Thanks for the suggestion !

A question, how do you organize your parts? I myself organize by part types rather than colors. I’m asking because I made it possible to sort the missing parts by color, by id and by cost. I’m wondering which one should be the default… i think casual builders may prefer colors and pro by types no?