You mentioned that the board is for Indo. Have you talked to anyone who
has surfed there? That might be a place to start.
I have recently spent some time there (Mentawais) and if that is your destination,
then you might want to reconsider a quad.
All of the surfers I met there, from Australia, Hawaii, Japan, Brazil, etc. were on
thrusters. One of the guys brought a hi-po twin fin and only surfed it on the inside
of the smaller breaks a couple of days and then put it away. The waves there
are not fun, they are fun and serious. With what you are planning on taking I could see
you spending most of your time on the sponge as it is really hollow most of the time.
That being said, if you do consider a thruster, my recommendation would be
the following:
6’3" - 6’6" 11.4 x 19.25(2 to 3" back) x 14 that is around 2.4" thick with big base
fins for lots of drive & hold. PM me if you want to know the rocker dims.
You will need to surf the board some beforehand so you are confident on it. I like a
thumb tail as with an Indo wave you get in that tiny bit earlier. On our trip everyone
surfed boards like this all the way to XXX. The step ups stayed in the racks on the boat.
You need to get moving quickly and keep moving so semi-guns didn’t work as well. Also
the waves had a lot of power (whitewater too) so you need to duck dive deep. Everyone
got scraped at least once on the reefs. Us older guys surfed slightly bigger boards but
we needed to duck dive them too so they were low volume.
Find a shaper who has been or has team guys that he shapes for and you will be better
off. If you are going to Bali mostly, then find a shaper who has experience with boards
for there. I shaped nine boards for Indo and they all rode well but I had good advice from
shapers that had been there and made lots of boards for there. Good luck!!!
PS: Be sure to read the thread on holding your breath…