Can you give me a summary of the transformation of Kaka Mahajani's friend during his visit to Shirdi?

Certainly. The story from Chapter 35 recounts the transformation of a man who was initially a skeptic. A friend of Kaka Mahajani, he was opposed to idol worship and agreed to visit Shirdi only out of curiosity, making two firm conditions: he would not bow to anyone, and he would not offer any money (Dakshina). However, his skepticism dissolved upon meeting Sai Baba. As he approached the mosque, Baba spoke to him in a voice that was identical to that of his deceased father. This deeply moving and personal experience caused him to forget his resolutions entirely, and he immediately bowed at Baba's feet. His transformation was further deepened when Baba twice asked for Dakshina from Kaka Mahajani but not from him, making him feel restless and aware that Baba had addressed his unspoken challenge.