If that is a chant you prefer Magickdoggie. I prefer to chant my reason for PhotoReading as it keeps my mind on the purpose. I feel that OM'ing could be disadvantaged in that it's purpose is to empty the mind of external and yet it has potential because it connects one with the all that is.
Give it a go and see what happens. If after a few books you find it helps great, your trigger works for you. If it doesn't go back to what is taught because we know that works. Then explore again.
Alex