Prioritize the Soldering Iron when progression calls for it; then buy the upgrade that removes your current repeated delay. Ratchet or Electric Screwdriver helps screw-heavy work, while a Sonic Bath matters when cleaning—not assembly—is the bottleneck.
There is no universal perfect order because the shop can be constrained by different things. Use this decision rule:
- Blocked by a required task? Buy or unlock the required function first.
- Spending most time on screws? Move from the normal driver to Ratchet, then Electric.
- Waiting on cleaning batches? Increase Sonic Bath capacity.
- Only chasing comfort? Keep a weekly-expense buffer before buying convenience.
Recorded catalog
Tools, function and listed cost.
Cleaning capacity
Sonic Bath sizes.
Bath N3
Recorded capacity: 3 parts.
Bath N6
Recorded capacity: 6 parts.
Bath N9
Recorded capacity: 9 parts.
Capacity is valuable only when the bath regularly stays full. If it sits empty, faster assembly or a required license may produce more immediate value.
Avoidable mistakes
Three upgrades players misread.
- Tip Jar: tips do not automatically enter the balance. Check and collect the jar before closing the shop.
- Sonic Bath: older builds had part-loss problems that official 1.0.013r notes say were fixed. Update before diagnosing a missing-part save.
- Fast tools: speed does not fix wrong layer order. If a part will not place, inspect hidden screws, cables and frames first.
Evidence limit
Verify the shop screen before purchase.
The functions and listed prices come from collected community data, but the original dataset did not pin every row to a single game build. The recommendations above are deliberately based on function, not claimed payback math. Use the current in-game shop as the final price authority.