@Arm - thanks, but I much prefer flying to writing regs!
@uncopilot - from what I can infer, the ILS would satisfy the requirements for deviation indicator recency, but haven't seen anything which says a 3D approach covers you for a 2D approach. That doesn't really seem sensible though, so I'm assuming I've missed something somewhere, but then again, who knows with aviation regulations.
@Training wheels - yep agreed, it looks like the 35 days recency for ILS is definitely out.