Coyote jump AND jump sustain?

Hi, I decided my platformer needed "coyote jump" (where there is a short grace period after player falls off a platform where they can still jump) for game feel, so I implemented it using this tutorial:

youtube.com/watch

The problem is, because that technique uses setting a vector Y property for the jump, rather than the platform behaviour's default jump it can't access the platform behaviour's jump sustain properties, resulting in a jump that is always the same.

I'm wondering if anyone has any tips on how I could get the coyote jump working, but also be able to have jump sustain. A lot of the fairly well established platform games of the past few years appear to have both features and it helps a lot with game feel. Has anyone managed to achieve both in construct?

It also seems like a really good feature to add to the default platform behaviour.

Thanks!

As I understand, jump sustain works by constantly applying negative Y vector for the specified time. Here is an example:

dropbox.com/s/8ijtgxoljyzyc6t/CoyoteJumpWithSustain.c3p

Thank you very much dop2000, you are always so knowledgeable and incredibly helpful. This has helped a lot. I figured it would be something like this, but I couldn't quite get there myself.