1Productsheet 1/4
| Main housing |  Thailand |
| Heating element | Thailand |
| Motor-fan assembly |  China |
| PCBA | China |
| Switch, cord, minor | China |
Final assembly in Thailand.
Router · Gemini 3.8 Flash
Plan the production change before you build it.
See the origin CBP would likely assign, and which production moves would change it, backed by CBP rulings.
fig.1 — the heat gun
Kobalt 12.5-amp heat gun · real CBP rulings
Schematic from CBP ruling facts, not a manufacturer's drawing
Unde · plan · check 0.96, above the 0.92 bar
Motor-fan, PCBA, switch + cord → Thailand
Motor-fan, PCBA, switch + cord → Thailand
Step 1 of 4 · 2022 setup
Assembled in Thailand, key parts from China. CBP held China (N328954).
Step 2 of 4 · Taken apart
Each part, where it is made, and which decide the origin.
Step 3 of 4 · The plan
Make the motor-fan assembly, the PCBAPrinted circuit board assembly: the populated circuit board. and the switch, cord and minor parts in Thailand. Precedent checkAn AI agent searches and reads earlier CBP rulings for one where the same kind of change decided origin. 0.96, above the 0.92 barA plan is shown only when its precedent check is at least 0.92. On every run we scored, none above it was wrong. (N345938 for; no counter-ruling found).
Step 4 of 4 · 2026 setup
The maker moved the same parts, and the outer shells. CBP held Thailand (N357771).
fig.2 — how it works
one case, four sheets · the heat gun2Originsheet 2/4
Origin engine · Gemini 4 Argon
3Plansheet 3/4
Planner + verifier agent
4Draftsheet 4/4
Request for a binding ruling on the country of origin of a heat gun…
For a licensed customs broker
The line is the heat gun's facts moving through the case
fig.3 — how accurate is it
Test sheet · 377 held-out CBP rulings
A · measured on a scalebrackets = 95% interval
90.2% origin accuracy, vs 60.5% for the best simple rule (most-mentioned country).
96.0% correct on the 79.6% it auto-accepts; the rest go to expert review.
B · every ruling, as a squaresorted by outcome
auto-accepted, right 288wrong 12to review, right 52wrong 25
For · N345938
every move is checked both ways, for and againstMotor-fan, PCBA, switch + cord → Thailand
Against · none found
Unde Labs · test sheet 01How accurate is it? →Open the cases →
Who it's for
For trade-compliance and industrialisation leads at manufacturers moving production out of China.
CBP estimates 20 hours of preparation per ruling request (all ruling subjects). Asian-origin rulings take a median of 21 days (team count, n = 247).