I use this wee Stanley level. Comes with a clap so can be attached to door edges, frames etc. I’ve fitted many shops and kitchens with it and never needed a tripod or pole.
https://www.screwfix.com/p/stanley-cubix-stht77498-1-red-self-levelling-cross-line-laser-level/256FG
That was the one I had in mind. Always thought the horizon could be changed with tilting? Or that a pricer feature
Edit; the height of it obvs. But I might declare that idea wrong myself!
@dbr started
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I use this wee Stanley level. Comes with a clap so can be attached to door edges, frames etc. I’ve fitted many shops and kitchens with it and never needed a tripod or pole.
https://www.screwfix.com/p/stanley-cubix-stht77498-1-red-self-levelling-cross-line-laser-level/256FG