case_no_6, on 2014-April-28, 11:31, said:
What went wrong is that the 1H overcaller failed to show the potential to play in spades. I don't like to Double for takeout with 4 spades and 5 hearts if responder's bid in the other minor would be embarrassing as it would be here.
You already have a heart fit so I don't think your percentage bid is to look for another fit at the 3♠ or 4♣ level. I assume South meant double as a "Maximal" double showing an interest in game opposite a maximum raise. You can google "Maximal double" for a more detailed description.