Hello, I have just bought a ff creator pro and am having a difficult time to get the bed level exactly horizontal.

I go into utilities on the LCD Panel, click on level build plate, at which time the build plate and the extruders come very close to each other and then i use the paper sliding technique under the extruders so check the friction.

once this is done, i click "ok" and then when i start to print, i notice that only the location where the extuder and the build plate were touching is it level, but not level in the other locations...

so should i manually move the extruder around to all 4 corners of the build plate and do the paper sliding techinque at all 4 corners? will it harm the printer if i manually move this around?

should I use a digital leveler app on my iphone?

any help really appreciated....thanks guys!