Topic: Table Calibration for the Sane.
After a few goes realised, like others, that the 'Auto' calibration was going to send me bonkers pretty quick.
Here's what I ended up doing, which worked fine for me. (I'm on firmware 1.1.l)
Start a print, as soon as it starts beginning to print the little test print along the side of the glass,
turn the printer off at the switch. You want to catch the printer at it lowest position.
Open up the top and front and gently pull the print head along the rails to the right and then forward. Careful not to touch glass or print nozzle. Clean the nozzle off with the wire brush supplied with printer.
Let it cool off.
Cut a piece of paper to manageable size, I used 80gram printer paper.
Slacken the table adjust screws off so the printer head can be moved carefully across the whole table without touching the glass.
Slacken the table adjust screws off enough so the piece of paper slides easily between the print nozzle and the glass at all positions on the glass.
Move the print head carefully above the front adjustment screw. Tighten up the screw till the printer head goes from not touching to just starting to grip the paper, a 20th of a turn is enough to make the difference.
Repeat with the print head above the back right and left adjustment screws.
Now move the print head to about an inch back from each corner of the glass table, adjust the screws (should be small amounts now) until the same 'just gripping' distance is the same at all four corners of the table.
Turn the printer back on, let it initialise, do a test print and be ready at the off switch just in case.
If the print is ok, don't even look at the calibration.
It will still take time, but, I think better that chasing the numbers.