Hi Paul why do you not fly all approaches 4 axis coupled. It is much easier and far safer if you have a DAFSC.
CRAB 24 years ago I was flying the S61 in Sumburgh.I think we only had heading hold of some kind. A funny triangle shaped button on the AP panel. No ALT or IAS holds.
Does your Seaking allow you to couple in 3 Axis (ie cyclic alone)???
DB