I can not understand.......
but the laser you use it only for walls and level floors fund ?.
because you have these you can not do the squaring of a floor.
when I start tile floor, in two minutes I know if the four sides of the room are 90 ° and thus change the start. or if the corridor is a team with a room where the start, then the sound of the receiver placed on the ground will make miracles .....
with laser I saw above (Part 1) you can only project to a maximum of 1 line in the ground, of course the cost of my bosch gll3 is high, but much recovery time.
I hope you understand what I have written, and I apologize if maybe I'm wrong. but I got cross laser Hilti, Makita, rubi and stabila before we get to that Bosch