I don't have a Ceis but I'm interested to know how it Steps through?
I had assumed from looking at it when thinking about buying one that the only Steps are the Gates generated that come from the A.D.S.R points and that the actual envelope that is made simply flows like you would expect from any ADSR module.
You will get a different effect depending on whether you are sending it a Trigger or a Gate, the length of gate corresponding to the SUSTAIN section as the level that the sound holds while the key is pressed, even my A-R envelopes (PipSlope) respect the Gate length versus sending it a simple Clock or Trigger.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.