Yes - that is correct. It cannot.true but the hub setup stuff cannot check caster I think, it's worse kit than the OPC already have.
When RPM first used on my 981, they did initial setup on the MR hub kit and then had to put it on the traditional Beissbarth/Hunter to sort caster.
But if the OOTB MR setup is still quite mild - might not be too much of an issue anyway.