MP, Instant
What is the point of having short suit trials in your system if on a hand such as this responder does not take the trouble to identify the Diamond shortage and stop in 3H?
Personally I prefer to bid the shortage directly over the raise and use the next step over 2H to show a generic game try with no shortage. But I don't insist on it - the benefits of that switch are marginal. But with system as it stands it behoves responder to enquire.

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ing) tr. v. - Any bid made by bridge player with which partner disagrees.