DevonDiver
N/A
One thing (you may not have been taught this), is to deflate your bcd, you dont have to find the inflator end, you can just tug on the hose, and there's a valve where the hose enters the bc to dump. Then you dont have to do the "hand high" deflate. Except upon first descent, this is often the only dump valve I use.
I dont know if all BC's has this, but mine does.
No, not on all BCDs. But it could be retro-fitted.
Personally, I wouldn't choose a pull-dump LPI... when you look at how the corrugated hose is attached to the fitting, or the fitting to the bladder, you may reconsider wishing to tug on it every dive.