Could you explain this danger further?
I've actually seen people brag about how little lift their BC has. But the old axiom always rings true: Don't try to haul two ton of fertilizer in a one ton truck.
Now, I'm a big believer in having a "balanced rig"... one that needs little to no air in your BC is great. Depending on how many tanks you're diving and their composition, it's not always possible. If you're not diving a balanced rig, then you have to have redundant buoyancy if something happens to your primary buoyancy.
If your BC can't float you easily on the surface... without your assistance, then it's too small. Your head is about the same weight as a bowling ball. Your BC should have enough lift to keep you afloat with your head above water, without you having to kick. So you you have to have enough lift to get you completely neutral and then an additional 15 bounds. Are you wearing a drysuit? What do you do if it floods? Weight is warmth, so how do you mitigate all that extra weight you're using to sink that drysuit? So your BC should have enough lift to compensate for that as well. It should have enough lift to get you neutral, to compensate for any lost buoyancy and that 15 pounds needed to keep your head out of water.
Me? I love diving LP120s or LP95s with my sidemount when I go into a cave. Dang, they're heavy! Unfortunately, walking out is not really an option if my BC were to fail. Since I don't dive a drysuit, I dive a double bladder BC to give me needed redundancy.
So, dive a balanced rig, with a BC that will give you enough lift or dive with redundant lift. Just be sure that your buoyancy is sufficient to keep your head afloat.
Ah, the good old days.
Yeah, I dove those wings and they were great. Very, very stable and I happened to punch a hole in one and didn't die. Didn't even come close. However, those bungees compressed the bladder. You had to have lungs of steel to inflate the bastards orally. Doable? Of course, but the "work of inflation" was off the charts.
Many of today's systems use bungees only to combat the taco effect and don't restrict the inflation one bit. Left to their own devices, wings wrap around your tank and resemble a taco in shape. Strategic use of bungees keeps the wing down, improves stability as well as the drag coefficient without having to sacrifice lift.
So what's the "down side" of having too much lift? None really, except that you lose bragging rights for having the least amount of lift. I dove with the double bladder OMS 100 pound wing for years. Never inflated it to full capacity, never had a runaway inflation causing me to cork to the surface. In spite all of the internet wisdom to the contrary: I didn't frickin' die or even get hurt. Unbelievable, right? It was great but I had student fall in love with my IQ system, so I gave it to him.
