Rabbi Yosef Gavriel Bechhofer
הרב יוסף גבריאל בקהופר
Not quite R Shelomo Wolbe's זריעה ובניין בחינוך.I don't know how R Dovid raised his kids. But when he needed to rebuke a talmid, it was with a soft voice, holding his hand, and an attitude of "you and I both know you are much better than this."I tried this with my kids. I lack my rebbe's middos. I had to give it up because that affectionate stroking rapidly became squeezing arms too tight.