Here's one data point: As noted further up thread, 12AH batteries without the steel ballast plate yields a couple of ounces positive in salt water.
As a side note, I have a couple of Waitley 9AH batteries for sale. Check the classifieds for my post if interested.
I've dove my cuda with the fresh weightpouch rather than the salt pouch.... that wasn't as bad as last weekend when I followed the above (and have seen it posted elsewhere) advice of removing the steel plate, 75 minute dive and the last half was starting g to get painful trying to hold the scooter on our stops
A few ounces positive on a smaller scooter sucks big time!
_R