Seriously, though, most of what I do while waiting for class to start (when I'm not practicing another form) is practicing with a bong. I don't see your point about it being a weak grip at all. So long as you keep your grip tight, and your hands at thirds (so the weight is evenly distributed), there's no good reason to lose your bong. That's why we're taught to roll back our wrists when we do a high block, so the bong is still resting fully on the palm instead of just held in the fingers. And with any other block, the grip is still maintained. Especially when doing a middle or face strike, you have to make sure the forward hand has its fingers behind the direction of the bong, both to make sure all the power goes into the strike and that you don't lose your grip. I could demonstrate these things via video, if I had the time; maybe I will, sometime.
Your point about the inefficiency of the stance, however, still makes me wonder what kind of TSD you practice. As I said before, a technique with a bong only really changes in regard to the striking implement. You block right to where you need to block, leaving your opponent off-balance and open, not you.
Example: an opponent comes at me with a downward strike (bong or fist). I block high, catching the attack with my bong. The opponent's hand(s) are tied up by my bong, and my next move is to turn my waist slightly and strike him in the head or gut with the end of my bong. The only counter to that would be a *very* fast reverse punch (assuming hand attack) or a front kick (also *very* fast, since it has to come up, and I don't).
Example 2: an opponent comes at me low (foot, hand, weapon, whatever). I block low, stopping the bong just past my knee. The opponent's striking implement is now away from my body, meaning he's rather open from the front. Even before he would be able to come at me with a reverse punch, I'd be able to smack him with the other end of my bong. His coming in with a second attack would only hurt him more.
The fact is this: a semi-sideways stance may seem like a good idea to present less of a target for your enemy, but it directs your body away from the direction you're going to travel. That's why in chungul jase both your feet have to be pointed the same direction - forward. Not only that (and this is the second reason both feet are forward in chungul jase), but it makes you easier to push over. With both feet pointed forward, you're anchored into the ground in case your opponent wants to push you back, but you also have the ability to move forward quickly if you need to do so. There's absolutely nothing wrong with bong techniques in chungul jase, or *any* TSD stance.
) form called Bong Hyung Il bo.
