Just posted Part III but only a few days on from that things are progressing well. Septic tank has been excavated and installed. We are using concrete rings with small holes in the side to act and allow seepage. The system worked well on the other local houses so should work here for us.
So short video showing the progress from 3 days ago. It does have some noticeable changes in it from the last one.
Loads more to do but need to keep on top of it. Wanna has been staying up there to ensure we keep supplying all the necessary materials and fitting etc. So will keep pressing. We are looking for completion end of June.