I uploaded an updated version, Don Vito try it and let me know if the issue has been fixed for you!

Mmmh.. I was working on this vehicle few days ago - still try to make the airlock working.

I'm so grateful you found the specific problem... I'll try to put some grippers to sustain the container.

I experienced the problem over and over again, but found a solution, or rather what the problem was.

If I toggle and release the bottom connectors first, the container may glitch inside the vehicle hull.
To solve it, I keep the button to unload cargo pressed (i.e. Q), then quickly toggle the bottom connectors (with E). So when the connectors release, there is already some force applied on the container towards the back. Like this, the container doesn't glitch inside the vehicle hull.

Thankyou!

Yeah, the loading/unloading process have some issues, because the container is very heavy...
Repeating the process by clicking buttons may help you. I'll try to improve the unloading!

Nevermind... I reloaded the save and it worked.

Love it!
Amazing design.

Only problem I have is, when the container is full, I can't unload it. Too heavy for the arms..? (Yes, I unlocked the bottom)

I haven't crated something specific, but the container is equipped with two different rope attachments for helicopter transport, so you can easly transport the container with the machine attached...
For land transport best option is a trailer... I have created some, not sure they're uploaded yet, tho... I'll check and maybe i can create something specific...

Hey do you also have a creatin that we can transport this thing with? Looks really nice btw