This guide is just screenshot collection of my solutions that all worked for convoy runs.
Some of them barely makes it (like bridge starts to break, almost hits laser, gets shot by turret etc.) and some most likely contain way too many supports and what not but I didn't really care enough to trim them as no budget or stress limits.
Hopefully they either help you straight up or at least gives you ideas how to approach the level differently.

These solutions should also unlock all of the new achievements except these three:
Deliverance from Non-delivery
- First job for the Condolence Letter Delivery Fleet provided.
- Destroy one vehicle in "Portal Proficiency"

Condolence Letter Delivery Boom
- 50 test vehicles destroyed in "Portal Proficiency"


Portal Deficiency Certificate
- 10 times tried to start a test run with an uncorrectly placed portal.
- Just place 10 portals in walls/acid/etc. so it cannot validate.

As they require destroying or invalidations and can be easily done in any level.




They all worked as of 15th of November 2019.

Make sure that the vehicle hits the top of the portal so it bounces down and stays at the floor.

Principals of Portalability
- Finish every test chamber in Chapter 1 of "Portal Proficiency".


Convoyability 10
- 10 convoys delivered in the Portal Proficiency initiative.
- Obviously requires that you have done every previous test chambers with convoys.

Ramp at the end will break but for me all 5 vehicles made it still.

Advanced Tunneling
- Finish every test chamber in Chapter 2 of "Portal Proficiency".


Convoyability 20
- 20 convoys delivered in the Portal Proficiency initiative
- Obviously requires that you have done every previous test chambers with convoys.

Make sure that bottom left goes from right to left so timing is correct.

2 vehicles will fail the last jump (Probably could have added small ledge to the end) but they will just redo the loop and will be successful on the second attempt, so didn't bother fixing it.

I had slightly different build for single run and just tried to fixed it first, that's why this contains so much stuff. The 2 turrets in middle will shoot the forklifts but not enough to destroy them.

As this level has lot of "balancing" it might be tricky to get right and you just have to fiddle with them.

As I loaded the level again the purple portal was gone (for some reason some levels forgot 1 portal pairing) so I placed it slightly off but still works.

This will also unlock the achievement to use all available portals.

Tunneling at Full Capacity
- Maximum amount of portals successfully used in a test run.
- Use 20 portals success fully in test run.

Convoyability 30
- 30 convoys delivered in the Portal Proficiency initiative
- Obviously requires that you have done every previous test chambers with convoys.

Profound Portal Proficiency
- Finish every test chamber in Chapter 3 of "Portal Proficiency".