gthcd

In my partnerships, double of a 4♥ (or a 4♠) preempt is for penalties. It's in the system notes. Little discussed though is : 1. after 4♥ X is partner allowed to remove the X and bid 4♠ ? 2. what does he need to do that ? At this point I think the answers might be 1. Yes, 2. At least 5 spades, shortage in hearts, values (with some prospects of slam ?)