some weirdness:
- description of 4s says both 6+d and 3-card diamond. Which does North think South has? can description be fixed?
- I kind of wanted to bid 5s as South but it was described as cue bid for diamonds and forcing. Can't it just be offer to play? I doubled since it seemed to describe my hand other than the 6+d/3-card diamond contradiction thing.
- shouldn't North with extra diamond and big double fit try 5s at some point? Maybe 5s definition needs to be adjusted so it can consider bidding it?