Antony,
I have to say I generally avoid most arguments which take current cosmology as a given, because I find it completely out to lunch. For one thing I see time as an effect of action, the only problem is we try to build our perception of it as a sequence from past to future into the model, rather than the actual cause of the change which turns future potential into past circumstance. For example, it is not the earth traveling a fourth dimension from yesterday to tomorrow, but tomorrow becoming yesterday because the earth rotates. Hence caused by the action. This means that spacetime is a correlation of measures of duration and distance, not some physically real "fabric" which can be expanded, bent, bound, etc. It is similar as the giant cosmic gear wheels to explain the efficacy of epicycles.
Duration is not some dimension external to the point of the present, but is the state of the present between the occurrence of events.
Rather than residue from the big bang, cosmic background radiation could well be the solution to Olber's paradox, the light over ever more distant sources redshifted completely off the visible spectrum.
Black holes and gravity are treated as vacuums for everything falling into them, but not only do most gravitational sources about black holes radiate enormous amounts of light and other radiation, but the black holes shoot enormous jets of cosmic rays across the universe and binary stars eventually explode. That seems to me the Hawking radiation.
Since gravity is considered a collapse of space because mass points contract, I suspect the expansion between galaxies is a function of the expansion of radiation, creating a convection cycle of expanding radiation and collapsing mass. It's just we can only observe the light crossing these intergalactic spaces. Light is Einstein's cosmological constant. Universal, but also balancing gravity.
I would also point out there is an inherent contradiction in the theory; 1) Space is what we measure with a ruler. 2) Intergalactic space expands. 3) The result is that it will take ever longer for light to cross the space between galaxies. Based on 1, 3 contradicts 2, since our most basic measure of intergalactic isn't being stretched, since it requires more to measure the stretched distance. This makes it an expansion IN space, as measured by C, not an expansion OF space. This would necessarily make us the center of the universe, unless redshift is a form of optical effect, due to distance, then it would create a similar effect for every point in space.
Given all the major patches to keep it working, from inflation to dark energy, not to mention everything from time traveling wormholes to multiverses springing out of it, it is all bizarre beyond belief.
I do think as part of this cycle, that gravity is not so much a property of mass, as an effect of energy condensing into mass and mass condensing into ever more dense matter. Remember when mass is converted to energy, it creates pressure, so the opposite of this would be a vacuum.
Not trying to start an argument, since it seems quite futile to fight city hall on this, but just offering up my own position.
Regards,
John