The outer can be a real pain to get past the circlip when installing it. I use a hose clamp to compress the circlip, fully tighten it then back off 1/4 turn so it will slide. Put the CV on the tip of the spline and give it a good whack with a dead blow hammer. It will slide over the circlip, fully loosen and remove the clamp and then fully seat the CV to the base of splines.









I pack them with this