While the workbench either shows how or allows you to extrapolate how to do the majority of the conversion, one of the biggest items not shown is how to derive the subnetwork controllers for systems and pressure zones. This is problematic for a few reasons.
Te biggest issue is that this means that all the station regulators in your model will create three ambiguous connectivity errors (type 9, more than one rule exists). In order to resolve this error you need to properly identify associate the inlet and outlet terminals with their corresponding mains, typically inferred by a pressure differential between the mains on a regulator but in cases where there are two (or more) regulators working in a station only the low-side regulators will have a pressure differential. Once the inlet/outlet associations for each regulator have been defined each downstream regulator must be assigned a subnetwork named based off of all the other regulators it is connected with for the pressure system.
I've typically relied on python scripts to do this after-the-fact, but given that without the terminal associations most networks won't build I would have expected to see it included in the workbench.
Excellent! Since you're already using a topology builder that gets you half the way there, just find all the regulators with a pressure differential between their high side and low side and set terminals accordingly. This solution works for simple regulator stations with a single regulator, but for situations where there are multiple regulators working in parallel and/or series the logic gets increasingly complicated.