I believe opp overbid, but with both ♦A and ♥Q onside, defender need to lead a C to defeat the contract.(I led a trump when I played this hand)
Is this a special case or bad lead? How often do(What's your rule of thumb) you lead unsupported honor when there is no obvious clue(e.g. long side suit on dummy from bidding)?
Should we avoid leading doublenton trump when opp is known to have only 8 cards fit(e.g. if T is in dummy trump lead solve the problem for declare)?