The following sizes so far has had problems: 6.2 - 7.0 - 7.8 and 8.6
These are the sails I use most, so I might experience identical problems with the remaining sails well at some point.
Masts used are the recommended Enigma mast, the 8.6 is a Redline 490 though.
As for extension lengths, the Severne 36 extender and the shorter 16 is used.
All in all this setup should be more than compatible as it's the recommended.