Good call on hiding the tassels; that helps and though painter's tape didn't stick well on my wool rug and left a bit of residue. On that unit, mapping is decent but i still saw a few centimeters of drift between runs, so I had to make the no-go zone cover the entire rug with an extra buffer or it would still graze the corners. Also, watch the corner grippers—thicker ones made a tiny ramp the bot tried to climb, so placing very thin pads a little in from the edges kept the rug flat without tempting it.