If your not using a cup locator then cut that
off and let the OD of the spring to locate it
and dont worry about the inner.. the inner will
follow the outer(assuming the OD of the pocket
is like you say about the fit to the spring)
EDIT
The seal cutting tool I have will cut the guide
OD and that bottom part all in one cut.. make
sure your guide is cut down far enough to clear
the retainer at full lift