Thanks for the links and comments ..
Hetty has hit the nail on the head re the 'structural soundness' of the mattress ..
We bought a large piece of memory foam, or 'egg crate' from Amazon .. a beautiful blue colour .. 2" thick ..
Let it out of its shrink wrap and let it settle out for 13 hours .. it is a California King, so, it does fold over the foot of the bed about an inch .. just enough to make the mattress cover and sheets let go
Anyway .. it felt so nice the first week .. and then 'the bump' again became a factor .. I would try to turn over, and I was fighting gravity
Sears sells Beautyrest .. just am BLOWN AWAY
at the cost of a mattress .. but .. you go with the flow
Again ... thanks so much for the input
~M~