Hi Dbabicwa,
Just trying to share the stoke and introduce some new locations here. Although Pulau Tabuhan is quite isolated, laying in between Bali and Java, we always bring one of our boats with a crew and you will be kitesurfing with an experienced kitesurfer, either me or a friend.
Check this little clip uploaded by our Singaporean windsurf friends. The wind was solid over 20 knots (like nearly every day between May and the end of October). We were windsurfing on a 4.7 and a 5.0 and our kitesurfing guide was riding a 7 and a twin tip.