[Mynameishappy]

I'm a Theravada practitioner living in Laos, and I'm an avid follower of Ajahn Chah of the Thai Forest Tradition. I've never heard of the visualization technique that you describe, but I'm not conversant in all aspects of Thai Buddhism. Without passing judgement on the proponents of that method, I can only say that in my own practice, the further I stray from the simplicity of the "basics", the more trouble I get into! So I follow Ajahn Chah's approach of simply constantly watching my mind, along with using the mantra "Buddho" during "formal" meditation. Best wishes in your practice and on your karmic journey, Tom