Coming along nicely TD... so far so good with your builder and his team. If anyone reads these posts trying to learn anything about building in Thailand before they start their project, yours is the "go-to" thread.
Aside from recommendations, price, manner, professionalism etc when considering hiring the builder and the team, there is always an element of luck involved. That said, I'm convinced that at least half the issues that foreigners face when building here in Thailand is approaching the whole thing with an "I know best" attitude and micro-managing the project to such an extent that people just walk off the job.
Clear and concise plans and direction, good lines of communication and allowing room for errors (which can and do occur) without freaking out is the way (unless you are building a high-end resort and have teams of managers and architects employed to do this all for you).
Can't wait to see how your build develops once the aesthetic elements start to come in to play.
Top job so far TD... (by the way, if you or anyone reading this have any spare gravel left over, send it up to my place... rainy season is coming and I have yet to fix the dirt track to my place owing to being skint!
)