Not the team, but lots of experience with the predecessor of the IS97, i.e. the IS101.
A 6.2 sail is rather small for this board, but it will work. That's for sure.
Much depends on the water state.
I use a 6.7 as smallest sail on this board with a 34 fin.
When the water state gets choppier, I prefer to be with my 6.7 on the IS87 and a 31 fin.
When it gets even rougher, I use a 5.7 on the IS87 with a 28 fin.
Hope this helps.
IS87 / IS101 / IS122 / US147