it was kind of a pain to get apart at first
the 4 screws in the back where the copper shield is do not need to come out
and the white dial i thought was missing metal contact and one fell out but it's double sided and the top pcb has a smaller contact area so i hope & think it's fine.
all i really had to do to get it apart was pry with a plastic pry panel tool and it disconnects from the f1-4 buttons on the front cover.
adjusting the pot made more of a difference on higher rating caps than lower ones for example 10uf reads about 8