If you were an interior designer (or interior architect) and needed to use a wall-mounted laser level that had to be used quickly, what type of connection would you want between the wall and the device?
1. suction cups (which work best on non-porous surfaces)
2. nails or nailers (which penetrate the walls)
If your choice was adhesives, what type of adhesive goes on easy and comes off easy multiple times?
I'd try "Glue Dot". I often use their Low-Tack 1/2" dots for holding drawings on a wall. But I don't know if I'd trust it with an expensive level. I know they make a "High Shear" dot, but I've never used it. Might be tough to get back off without wall finish damage.
"True eloquence consists in saying all that is necessary, and only that which is."
François Duc de La Rochefoucauld