As someone who has flown the Vigilant from its introduction I can tell you that the reconfigured fuel system CURED the problems we had with the engine - if they'd ripped out the carburettors and fitted fuel injection whilst they were about it the vast number of DASORS for carb icing would have never happened as well.
I doubt any civvy 109 could divide its total flying hours by the total number of landings and get anywhere near the average of 12 minutes which was the result I got last time I did the maths on ZH118.
The Vigilant spends its life bashing the circuit and as its training 16 year olds the emphasis is on the word bash.