Very very tricky aeroplanes those C210's, they have three bladed props, fuel injection, retractable undercarriage, laminar flow wing, no struts, six seats and most have two VHF radios.
CASA really should make it a mandatory 50 hour course in a full motion simulator with Flight Safety then another 50 hours line flying with a person with at least 25,000 hours in C210's, before a six hour checkride with a CASA FOI.
Funny the old dude that gave me a C210 check ride, showed me that if it all went tits up, pull the throttle back to 17", take the first stage of flap and then put the wheels down and suddenly it become a Cessna 172 and was happy to fly along at 80 knots. The other tips were keep the weight of the nosewheel, know how the undercarriage works and slow it down in turbulence.