Great stuff, Walter! Did you go straight onto Oxford from the Magister, or had you some instruction on Harvard before tackling the twin? Can you remember if the Oxford had a propeller pitch knob even though it had fixed pitch props (just to get pilots used to the drills)?
Here's a photo, courtesy RuthAS, of a preserved OxBox in wartime training livery. This machine can now be seen suspended from the roof at IWM Duxford. I have read that the Oxford had its quirks, and that someone said the Wellington was an excellent trainer for the transition to Oxford
