How do I prevent two Physics objects colliding?

There's two objects I desperately need with the Physics behavior, so there's no other option around this.

Basically, I want the objects to phase through each other rather than colliding, only these two specific objects.

For example, two objects are falling, one after the other. Except one is faster than the other, and smacks into the slower one on the way down, throwing them off balance.

I need them to specifically phase through each other. Any solution here?

Switch em off. Like a light switch ?

https://www.dropbox.com/s/0kuoyak81m6bq ... .capx?dl=0

Switch em off. Like a light switch ?

https://www.dropbox.com/s/0kuoyak81m6bq ... .capx?dl=0

Your Capx is saved in a Beta version of Construct 2, I'll stick to the stable version for now ^-^

Thanks for the help anyway though.

I'm still looking for an answer if someone has it!