For manual placement I'd love to see some kind of "helper tool". Maybe something exactly like the placement of manual supports, just
a bar from the bed pointing upwards, setting the start/end point location for the currently selected process (or all).
If more than one of these "locators" would be supported for a single process that would make setting up multiple objects easier. Or
placing the start/end points for a single object to the closest "locator"...
The cherry on top would be:
While placing "locators" wireframe view is enabled and some kind of magic highlighting happens, showing where the start/end points will end up
(blue: "locators", red: position of start/stop points set for the selected process)