Yep, I leveled my bed by that same method by CHEP.
OK, after several experiments I've got result that satisfied me.
Thanks for all the answers and suggestions!
The clues were:
- level bed by CHEP method;
- set level height as 1/2 of nozzle diameter;
- set first level height as 1/5 of nozzle diameter;
- use concentric top/bottom pattern on round object.
In my case the nozzle is 0.5 mm, level height - 0.25 mm, first level height - 0.1mm.
I suppose better result can be achieved using glass bed.