Hi Yam cha,
My belief is that one uses either "tun" or "to" with a technique. Nothing in between or different. Or like FT wrote :
Begin of FT quote
"As for teh natural way yes you can do that but you will lose the Bak Mei body and power generation...Due the explosive breathing and body connecting. Is you do it just relaxed and no snapping or jerking then yeah go ahead but you will not have the bak mei geng jak ging." End of FT quote
I never breathe in while using power. I either breathe out or what kung fu fighter calls "create compression like inflating a balloon". To or tun, one of these 2 every technique. Let me PM you an example later today to explain my thoughts further.
Regards, Lau