Interior layout instrument
If i understand you correctly you want to do layout on the floor either reflectorlessly or using a "self-supporting" prism/retro target?
I did a lot of this before I had a robotic and the key is to set up plenty of control (retro targets) so you can move often, keeping close to the action.
Thanks for all the replies.
Reflectorless isn't an option as the laser light beam is not a perfect circle and the exact angle point isn't the middle of the light.
I'll be checking out "Bohnenstingl GmbH" for their solutions.