Thanks for the information, Ok
lets start again in a sense.
Would I be correct in saying that if there was nothing in the universe (hypothetically) there would be no force, pressure...etc
Only when something is present in spacetime would you have an effect? Actually only if you have 2 objects since they would then have something to react with (each other).
I may be saying this (hard to explain).... Is it the object that has an effect on spacetime and the other objects react to this change in spacetime?
Thaks for your patience, I would have replied earlier but did not turn on the send email button to responded messages.