Bas just started his Divemaster course a few days ago. He's planning to complete the course within this month, April 2009. Not impossible but it will require hard work, but Bas seems to be up for it.
As an interesting side note, Bas is travelling Asia by bike. He didn't take his bike to Samui but rather rented a motorbike instead for the time he's going to spend here.
Bas, hope you enjoy your Divemaster course as much as you enjoyed the previous courses.