Start on building Unitce house today, one group mark a corner each. We try to mark our point from point other group established but find out if they are wrong we will also be wrong.

Once building corner is marked, we set up profile 900mm away from the corner and establish FFL by taking it from the group with highest ground  level. We also learn that people often move dumpy out of level, so always check bubble before using. Once leveling the dumpy back, have to reestablish a new marking and start again.