I don't get the robotic arm, what's it's purpose? And that's got to be a fair amount if money to throw away in everyone. There still using Canada arm 2 to birth which means Canada arm 2 can reach it and retrieve anything in the unpressurised compartment. Unless it's just in there fir the servicing satellites and wouldn't be on the iss version.
Also throw away, which isn't the right way to go for a future craft, nasa needs to return experiments and the cost.