Stabilizing the counterpart sign Stabilizing the counterpart sign (nimitta) isn't easy. Is there a 'technique' that leads to stabilize it? I.c. is there a 'technique' to develop/cultivate intensively the absorption factors (jhanangas)?

With 'stabilizing' I mean: making the nimitta sharp, focused, completely free from tension (of the panca nivarana), so that absorption (1st jhana) can be attained.
The prepatory steps (precepts, location, time, etc.) are just as important as the actual practice. Ven.Buddhadasa's detailed anapanasati's instruction might be useful..