Could you narrate the experience Kakasaheb Dixit had involving a vision of Vitthal and Sai Baba's role in it?

Certainly. As described in Chapter 4, one morning after his bath, Kakasaheb Dixit was meditating when he received a vision of Lord Vitthal. When he later went for Sai Baba's darshan, Baba surprised him by asking, 'Vitthal Patil had come, right? Did you meet him?' Baba then playfully advised him to 'Nail him down and make him steady,' as Vitthal could escape with even a moment's neglect. The proof of this event was solidified later that afternoon when a seller arrived with twenty-five pictures of Vitthal of Pandharpur. One of the pictures was an exact replica of the form Kakasaheb had seen in his morning vision, causing him to marvel at Baba's words and purchase the picture for devotional worship.