Hi Andy,

Unlike many sport planes and almost all trainers, most warbirds wing loadings mean they can still achieve sufficient sink rates with positive throttle on demanded of their higher approach speeds for (notably tip) stall avoidance, so setting that higher flight idle RPM required to ensure an unstumbling transition doesn't present the same problematic issue.

None of this actually alters the MAG carb fitted engine's idle and transition characteristics, but just determines whether they present a problem in specific application or not. As you rightly point out, in your specific application = not.