Playing Precision, the bidding went:
1♣! - (P) - 2♦ - (2♥)
2NT - (3♥) - 3♠ - (4♥)
?
1♣ = 16+ HCP
2♦ = 8+ hcp, 5+ ♦
At this point, you know 4♠ is likely cold, slam is uncertain (and can you explore it safely?), but you're also staring at 6 defensive tricks, and partner might have 2 or 3 more. The questions:
1) What do you bid here?
2) If you double for penalty, what is your opening lead?
3) If you could change a bid, what would you change?
I'll post more particulars after I get some responses.

Help
