# Build from what you have, and order the rest

Your loose parts may already make a set you do not own, or a set you own may only lack a handful of parts. In this tutorial you let Build Scout rank the catalogue by how much of each set your stock covers, turn the best one into a copy, and collect the missing parts of several sets into one BrickLink wanted list.

It takes about 15 minutes. You need a Brick Work install with the catalogue loaded, a good amount of [loose stock](../concepts/collection-model.md) and some copies with [recorded missing parts](../how-to/check-set-parts.md). The pictures come from the invented demo collection, so your numbers will differ.

## 1. Rank the catalogue by your stock

1. Open **Workbench → Build Scout**.
2. Each row is a set, best first. The bar and the percentage say how much of its parts your loose stock covers; on the right are the missing parts, the missing minifigures and an approximate cost to complete.
3. Narrow the list: **Parts from** chooses which stock counts (loose stock, lots, storages), **Min** is the least percentage, and **Theme**, **Years** and **Size** keep matching sets only.

![Build Scout on a desktop: a list of catalogue sets ranked by the percentage of their parts the loose stock makes, with missing parts and cost.](../img/tutorials/scout-list-desktop-1440-light.png#only-light)
![Build Scout on a desktop: a list of catalogue sets ranked by the percentage of their parts the loose stock makes, with missing parts and cost.](../img/tutorials/scout-list-desktop-1440-dark.png#only-dark)

The percentage counts the set's own parts only. A part in another colour is listed apart as a swap and never counted, and minifigures count as whole figures, not as their parts.

## 2. Look at one set and build it

1. Select a set. On a wide screen its details appear beside the list; on a phone the set opens as a page. You see **Parts you hold**, the biggest missing lines and the figures you hold.
2. Select **Build it · make a copy**. The parts and whole figures your stock covers move into a new copy, and what the stock lacks is recorded as missing on it.
3. **Undo** puts the stock back and archives the copy, as long as neither has changed since.

![The details of one set in Build Scout: parts you hold, the biggest missing lines and the actions Build it, Add to wishlist and Missing parts XML.](../img/tutorials/scout-set-desktop-1440-light.png#only-light)
![The details of one set in Build Scout: parts you hold, the biggest missing lines and the actions Build it, Add to wishlist and Missing parts XML.](../img/tutorials/scout-set-desktop-1440-dark.png#only-dark)

**Add to wishlist** notes the set as *Buildable from stock*, and **Missing parts · XML** downloads what is missing as a BrickLink wanted list. [Find sets to build from your loose stock](../how-to/find-sets-to-build.md) has the rest.

## 3. Order what is still missing

1. Open **Planning → Complete sets** and press **Order missing parts**.
2. Tick the copies whose gaps you want to fill. **Leave out sets to sell or part out** is on by default, so copies you plan to sell stay greyed and unticked.
3. Read the order list on the right: its heading counts exactly the ticked sets, each line is a part, colour and condition combined over those sets, and a chip per set shows where the quantity comes from.

![Order missing parts on a desktop: sets with gaps on the left with ticks, the combined order list with source set chips on the right.](../img/tutorials/order-missing-desktop-1440-light.png#only-light)
![Order missing parts on a desktop: sets with gaps on the left with ticks, the combined order list with source set chips on the right.](../img/tutorials/order-missing-desktop-1440-dark.png#only-dark)

4. On a phone, select **Review list** for the second step, then **Export · BrickLink XML**. The file `missing-parts.xml` is the same one Complete sets exports for those copies.

![The review step of Order missing parts on a phone: the combined lines and the export button.](../img/tutorials/order-missing-review-phone-390-light.png#only-light)
![The review step of Order missing parts on a phone: the combined lines and the export button.](../img/tutorials/order-missing-review-phone-390-dark.png#only-dark)

Lines Brick Work cannot name for BrickLink are listed in the yellow box with a link to the item, so you can link it and come back. The page only reads, so nothing in your collection changes.

## If you own the wrong variant

The catalogue sometimes lists the same part or figure twice, an older and a reissued variant, and your stock sits on the wrong one. On the item's page press **Change variant…** in the Links card, choose the variant you own, check **What moves** and confirm. Everything you own moves to the other item in one step with **Undo**, and the BrickLink number follows.

![Change variant on a desktop: the part, the suggested variant chosen and what moves.](../img/tutorials/variant-change-desktop-1440-light.png#only-light)
![Change variant on a desktop: the part, the suggested variant chosen and what moves.](../img/tutorials/variant-change-desktop-1440-dark.png#only-dark)

See [Change an item's variant](../how-to/change-variant.md).

## What you did

You ranked sets by what your stock covers, built one from it, and collected the missing parts of several sets into one wanted list. From here:

- [Find sets your loose stock can finish](../how-to/match-stock-to-sets.md) for the sets you already own.
- [Decide which set to repair first](../how-to/plan-repairs.md) to rank repairs by what they gain.
- [Pick parts for several sets](../how-to/pick-parts.md) to fill gaps from your drawers before you buy.