Cool...
..better safe than sorry, trust me, I know all about extra bits lying around after the job!!
You need to decide if you are going to replace entire axle assemblies...
......or simply from the "Green Cup" outboard.
If its simply a question of bust CV boots.....
...you'll save big $$'s only doing the outers.
However..if you have concerns about the entire axle...do it all now.
Cheers
jo