No - definitely no evidence of H.P. cock guards on that A/C either. I have no idea why this modification has not been made mandatory by the manufacturer. Of course the pitch and HP cock knob ends are completely different shapes which was what saved me and probably countless other DHC pilots over the years who are too ashamed to admit that they were caught out so DHC were never aware how serious the problem was, but it is easy to do - especially when you are tired. The A/C is of course designed for entirely single pilot operation, but in many cases it is now always a two crew job as it became in the U.K. in about 1990 when single pilot public transport operations were severely curtailed.
Pity in some ways - I have fond memories of flying up to the Midlands with foggy conditions below, sorting out diversions, RVR's, handling agents, company ops frequencies with no form of autopilot, expecting an ILS down to limits, and a passenger in the RHS! If I remember correctly, he was impressed!
P.P.