Hi Sifu Cottrell,
<<<I cannot add substantially to the list you have given for Qixing. It is a very complete description.>>>
First and foremost, thank you for the support. I really appreciate it. I believe the old Chinese adage “toss a brick to entice a piece of Jade” applies here. I hope that prominant Qixing proponents such as yourself will fill in the gaps and make corrections.
<<<I would observe that it is indeed that set of ideas and description of technique that defines Tanglang. It can be quantified, listed to that number of major ideas and demonstrated. What I find today is that many “tanglang” practitioners know 8hard 12 soft and a few forms and then add whatever they can find to supplement the rest rather than seeking the traditional answers. They take cover behind some vague adherence to “principles” that they cannot define clearly. You hear it on this forum repeatedly as instructors seek to redefine saying, “Ling is like controlled sparring”. It is not. Luo Guangyu had a progression from Ling to freefighting making it very clear that Ling is something unto itself.>>>
I learned Ling Form method from Tainan Mantis. I think it is one of the most empowering experiences in PM training anyone can get. This makes me inclined to echo this statement “Luo Guangyu had a progression from Ling to freefighting making it very clear that Ling is something unto itself.”
<<<Though I can only comment on your comments in terms of definition, I can speak to the role of sets in the training of Qixing. One learns to fight like the sets and from the sets, not always exactly in the same sequence, range or technique as it appears in the set but the set is both the mold and the resource nonetheless.
The movement from Lien, (drilling) to Ling (partnered exercise using the form), Pi (broken out parts of the sets), Chai, (combinations of techniques) that yeilds the Yongfa, (method of use) that then moves into the Bianhua, (variations), is a clear one for the traditional practitioner that leads to increasing levels of freedom within the system, just as one learns to play anything once one learns to use the chords on a guitar. If it begins to depart from the dynamics one finds in the forms then there is a problem, (ie, one must kickbox before learning tanglang at some schools, a problem and a counterproductive waist of time IMHO, if one’s goal is to learn Tanglang).>>>
May I say this is one of the finest and clearest lessons on PM (with HK 7 Stars perspective) that’s openly shared in public. Truely thank you for that, Sifu Cottrell.
<<<Many schools learn Tanglang technique and forms then move incredibly to kickboxing when they fight, using their feet and hands in that manner rather than the distinctive method of Qixing Tanglang. This always happens when the instructors knowledge is incomplete in teaching the progression that leads to fighting with Tanglang. THere are entire organizations, I am sorry to say, that propagate this kind of approach.>>>
I hear you. I believe that might have something to do with the proliferation of forms in mantis as well. Even the other lineages in Taiji, Meihua, Liuhe, etc face similar problem. More is less in Kung Fu sometimes. Almost everyone in NPM would know or at least heard of Bengbu. Today it is considered the foremost and one of the must have by many. But why and how is it important? More importantly, who really can fight with the exact combinations outlined in the form? Bengbu IMHO is a novice form. If one can’t fight with that, what is the use to learn the other 99 forms in the system?
I also would like to stress your point that attribute and fighting theories of a kickboxer (seeks to overhelm with power) is very different than that of a mantis stylist (discerns between hard and fluid).
<<<The fact that the question “what is traditional Tanglang” has to be asked and answered regularly on this forum is evidence of the degree to which the art has been obscured by misinformation and ignorance. >>>
Speaking of that, when I read writting on Mantis by WHF, Lee Kam Wing, etc… I could relate to their teachings despite the fact that I am from a different lineage and a different generation. My point is that Tanglang is Tanglang. Tradition lives in the experience we shared with the masters like the new candle that’s being lighted up by the previous one. There are plenty of new candles yet to be lited.
<<<(Let me note here that I am not implying that anyone asking this question on this forum is among the ignorant. I know full well that some ask this question so that others may read the answers).>>>
Thanks for the clarification. 
<<<Anyway, my usual rant. Sorry…>>>
By all means. It’s great to have your insights.
<<<Hope it helps anyway,>>>
It does for me, thank you.
Warm regards
Mantis108