It amazes me that CASA haven't made it a requirement for a servicable auto pilot to be fitted to this class of operation.
Its all very well to demonstrate a competent instrument approach in a simulator but in real weather with associated wind turbulence, rain etc its a bit more demanding.
Flying manually and taking your eyes off the gauges frequently to check the fine print on the approach plate in turbulence ups the ante. How easy it would be to misread the distance versus altitude required to the next waypoint ,for example.
You guys/girls who do it for 21k per year deserve the assistance of an auto pilot to take a lot of the load off at the critical times.