Official comment
@Neil > Neither the roll nor scan are moving heads, so I can't say for certain (the scan may be more likely as it has common pan/tilt function).
Yes, you can either assign them the same function as the same unit (eg. PAR1, PAR1, PAR1), or you can simply address the DMX the same for each fixture you want doing the same thing.
@Tino > Neither of those bars are supported fixture types, sorry.