Sifting through the sands of an old thread I thought I might isolate some posts that seem to be some direct insight into the conditioning one might have undertaken in the TCMA practice of Bil Gee training of thrusting/darting fingers. Here are quotes from one of the forum members who so kindly offered first hand experience from a time when information of lineage practice/technique was closely guarded and unavailable to the public domain.
Lee Chiang Po
Lee Chiang Po is offline Registered User
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When I was a young man, I would use a large box of loose sand for training my hands. I would spear my fingers into the sand box in an effort to drive them as deeply into the sand as possible. At first the fingers will try to turn in every direction. Eventually, the hand strengthens and learns to align itself so that it has stability and penetration. Your hands will become extremely tough and take some really blows. It will not injure your hands or your eyes. Targets for Bil Jee are the eyes, the throat, the face and sides of the head and neck, the arm pits, the groin, and the liver and the spleen. By groin I am not refering to the testicles, but the crease from the hip bone to the pelvic bridge. This area is just loaded with nerves and large blood vains, and a strong bil jee to the groin can prove fatal. The throat is a good target, and it will drop an opponent instantly. But if you are not careful you can collapse the wind pipe and kill the person.
You really do not have to abuse your hands in order to train them to become serious weapons. Just consistancy in your training of them. Use loose sand.
The way you use the hand is to use the 2 middle fingers as the main spear point with the little finger and the first finger as a brace for the middle 2. And of course you know how to roll the hand at the wrist on impact.