I’m running the 2.5.0 snapshot release(I have elero roller-shutters which are not yet in the stable release). Not sure what that means for the scale transform.
But… using a string type seems to work THANK YOU!
I have to test a bit more though (it’ll have to wait though, not much time the coming days 
) to see how to use it in my rules, but this is beginning to look good 
