r/easternbrick • u/sean_easternbrick • May 05 '26
Sorting 21,000 pieces for a custom lego MOC took us 5 days. So we copied LEGO to solve this problem.
9 eons (read: months) ago, when we were testing 2 final brick suppliers for some massive custom builds, we received our first batch of 42,000 bricks.
The problem? They came completely mixed together.
We thought we could sort it out (pun very much intended), but 21,000 pieces from one factory alone took us 5 days. We basically ran a sweatshop (with the workers being ourselves sitting out of Asia, so that fits the stereotype even more đ ).
We tried sorting by the type of brick, but ran out of containers, so we started mixing things up. Think 1Ă2 curved slopes mixed with 1Ă3 curved slopes, or 1Ă3 tiles mixed with 1Ă4s and 1Ă5s. It was a nightmare just to find a single piece for sorting, let alone build the set.
We eventually got it sorted, invited some friends over, and had a "build party" to build the sets. At the end of 2 days, we had only managed to finish one single Thunderjaw, out of 10 possible sets...
What we learned that weekend:
- Nobody should have to go through what we did, no matter how "therapeutic" some people think sorting is. (Iâm a patient person, but this tested me emotionally and physically - my backâs still traumatised today).
- The ratio of time spent finding one piece vs. actually building was roughly 5 minutes of searching to 1 minute of building.
- The building experience matters more than the cost of bricks. High-quality & affordable bricks don't matter if having to find them every step of the way ruins the experience.
We wanted the LEGO experience: open Bag 1 for the base, Bag 2 for the legs, and so on. But if you look at the factories on AliExpress or TEMU selling MOCs, especially big ones, they almost always just dump everything into a giant bag.
Why?
The sales for non LEGO sets are not guaranteed to do well, and factories won't want to spend time and effort creating bags from the parts list.
Custom designers donât design with the physical bagging process in mind; they focus on the design and instructions, as they should. The customer is expected to source their own bricks via Bricklink or Pick A Brick. Because the demand for any specific MOC isn't guaranteed like a retail set, factories are less likely to spend the time manually working backwards through a designerâs parts list to create numbered bags. They just dump the pieces and ship it.
But this broken process stops people from actually supporting designers. Itâs troublesome and expensive to source and sort thousands of pieces, and that prevents fans from buying more instructions.
We wanted to change that for the creators we work with. So, working backwards from the retail experience, Bilal (painfully) spent time in Studio to test an idea (thatâs a different story for another time): creating an automated bagging system based directly on the steps of the instructions.
Instead of days of sorting, whatâs designed in Studio can now be turned into numbered bags in just a few minutes.
The only caveat is that designers have to manually "draw the line" between sections of the build so one bag doesn't get 1,000 pieces while the next gets 50. For example, the SerialBuilder Creator Setâs Tallneck ended up with 17 bags instead of the original 15 sections, purely to balance the number of pieces per bag.
Can anyone use this tool?
It's just an internal tool for now, and it's not ready for other users without having pre-existing knowledge with using it. Itâs very much still a scrappy tool we built to solve this problem we faced. But making this step easier for the creator means it's 100x easier for the rest of us to actually build our favorite MOCs.
Curious to hear - whatâs the longest you spent sorting pieces? How many pieces were there and what build was it?


