Unable to launch clips using “clip slot – fire” in Reactions, and a couple of other questions

Hi there,

Enjoying the software so far, currently creating a custom control script for my MIDI Fighter Twister.

I’ve got some of the functionality I’m after, but still missing some things, especially being able to fire/launch clips in the session view, and maybe I’m missing something obvious.
I’m using Reactions to execute the “Clip Slot – fire” action when I press a certain button on the MFT, but it doesn’t seem to do anything at all, whether I currently have an empty clip slot highlighted or not.
I’d like to be able to highlight an empty clip slot, click the button, and then it start recording a new clip into that slot. If there is already a clip in there, I’d like it to play the clip.
The help/tooltip for “Clip Slot – fire” looks like it’s pretty much exactly what I’m after, but doesn’t seem to do anything when I run it.

Also, I would really like to use one of the knobs to zoom in in the arrangement view, I’d also like to use a knob to “nudge” MIDI clip notes left and right.. is either of those functions available as an action?

Thanks for any help!