Kung fu requires strong legs and a supple waist. Without stance training, you will be missing one of those elements. Strong stance skills means your legs have greater density and therefore, armor. Also, when you train deep stances, it creates a better kick. If you train only with weights, you dont have that "sticking" power as you would if you did stance work. I noticed that when I kicked before stancework, I would hit hard but bounce off. After doing stancework, my legs were soo used to resistance that they drove through. Somehow it helps with target penetration, but I am unsure of the physiological aspects of it.
My (horse stance) ma bu is 45 degrees off my center line with my feet on the railroad tracks (parallel). 45 degree bend is nice, as it works more of the leg than a low stance, in my opinion. The lower you get, it feels like I am using more arse muscle than leg.
The most I train is two minute intervals, regardless of how long I can max out at... Its like lifting weights. Its not about doing the max, as it is about repitition. Plus, the more you do horse stances in great repition, the better it feels when you get up. There are times, that your legs literally orgasm in pleasure when you get up. For some of you guys, it might be the only chance you have...
"If you and I agree all the time, then one of us is unnecessary."
It is impossible to defeat an ignorant man in argument.
- William G. McAdoo
Against stupidity, even the Gods contend in vain...