Dear Khalsa Jee,
I view it differently. I am not for making it, in some way, similar to some the ritualistic practice followed by a branch of another faith. This is not a Yogic practice. Sikhi does not need any sustenance from other faith and has no reason to bend itself to resmble them.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-sikhi-sikhism/768-say-waheguru-waheguru.html
The term 'Waheguru' is what it means i.e. Wah - e - Guru. It mean admiration for the Ultimate Guru i.e. 'The Sat'. I do not see any other meaning of it. Repeatition of this term has meaning if I have the feeling of appreciation of the greatness of 'The Sat', who has given this life and sustains it in me and carries me through this Samsara. I do not have to repeat this word loud, I can repeat it in my mind. My thought should be fixed on the one who is my source to whom I am grateful for all it has given me.
Repeating this term the way it is suggested in the first post of thread, in my considered view, will negate what Gurbani says.
'The Sat' is Nirakaar and does not need any place to live, it is every where; it cannot be related to any specific part of human body. There used to be a saying on this net, which was something like this - 'If you cannot see God in all, you cannot see God at all'. This is another way of saying that 'The Sat' is every where, which is in line with Gurbani.
The practice suggested above will distract my thought from 'The Sat' to my body, it is not what the Gurbani teaches.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=768
With love and respect for all.
Amarpal