Do you have an instructor lined up yet? I just finished my open water a few weeks ago at Tioman and have been itching to get back into the water. If you are interested my instructor was very good and he organizes trips pretty much every weekend all over Malaysia.
drop me an email if u would like to get his details.
I wouldn't mind getting a group together in late May, but probably can only do Sat/Sunday. So let me know.