Classic method of dropping through platforms: down + jump

How on earth can I do this? The biggest obstacle for me seems to be that I can't keep the character from jumping. What I initially tried was something like this:

MouseKeyboard: "Down" is down

MouseKeyboard: On "Jump" pressed

System: Trigger once

PlayerFall through platforms ? Yes

But... I can't even see what sort of result, grossly wrong or not, that gives me because of the character jumping. Is there a way to do the classic down + jump way of dropping through a platform?

How on earth can I do this? The biggest obstacle for me seems to be that I can't keep the character from jumping. What I initially tried was something like this:

MouseKeyboard: "Down" is down

MouseKeyboard: On "Jump" pressed

System: Trigger once

> PlayerFall through platforms ? Yes

But... I can't even see what sort of result, grossly wrong or not, that gives me because of the character jumping. Is there a way to do the classic down + jump way of dropping through a platform?

Platform behavior - allow down button

That's enabled by default, and... not really what I wanted to do. ^^;

Hmmm... I tried that, and... what I got was a Construct glitch. I start falling through platforms right away with jumping because it's detecting I'm holding down the jump button... But that's in a sub-event! It shouldn't be acting independantly on it's own... o_O

In the platform object check the platform attribute, uncheck solid.

Nothing else needs to be done.