I also agree with Ken.

When I first started doing rollers I would think of each 90 as its own manuever. Then I realized if I carry the rudder that finishes the first 90 into the second 90 the figure started looking much better and I keep a good pace.

I have been worried about the move to unlimited and facing the outside to inside to outside to inside roller then I realised it is still the same rudder input that carries from the end of the outside to the beginning of the inside. So you can still keep a pace even though you are changing roll direction.