I was told the same thing, which make sense, but not sure how true it is.
Was never a fan of BB, doesn't give me the natural look.
I had about 4-5" of southdown about 6 years ago when the system was setup, but now theres only .5-1". Does anyone have same problem?
This thread made me add 80lbs to cover up some low area, which caused the milkshake effect for the entire weekend!