In a similar vein....

one of the significant challenges for Spitfire pilots was a simple engine "upgrade". Essentially, the MkXII spitfire was a MkV with a Griffon engines rather than the Merlin. They rotated in opposite directions. Thus, the torque on the MkV's which pulled the plane to the left on take-off was reversed to the right on the Griffons. Pilots had to "re-learn" the habits of applying rudder on take-off, and there are stories pf people being on leave during the switch from MkV to MkXII, and no-one telling (re-training) them of the change in engine rotation. Stories exist that include crashes, and other wierder things like people taking off at 90degrees to the runway.... (people had the habit of holding in right-rudder on the MkV's, and this just perpetuated the problem with the XII's).

Anyways, food for thought.

gus