Jersey,

I've been able to walk in an open root (front or back feeding) with TIG in the 6G (and all other positions) for around 35 years now. I can also put one in there free hand in those less than optimal "tie-in" situations where there's so much restriction there isn't room to walk a cup. Believe me this is not a case of me being critical of the technique because I'm not able to do it.