Guys, it seems you don't understand the topic here. There's no problem in having a "custom" variable to set the angle (and later retrieve it). The reason for this topic is that there's an action within the platform behavior called "set angle of gravity". However there's no expression like "object.platform.gravityangle" to "natively" retrieve the value of the angle. In other cases, for every value (it seems) there's an expression to retrieve it.