Yeah, but the 4th dimension doesn't rally have much sway in this arguement, if we were discussing acceleration due to Gravity, then yes, but as we are just dicussing Gravitational Potential and trying to define Gravity. It's a force, and it's a force we can model and show, but we can't give proof for it. I think the best model is still the linen cloth, but you can't be so restricted to think of it a 1 piece of cloth with a ball in the middle, you have to think of it as one of hundred of solutions, but that one is the only one wich will work whilst we are under the influence of the Earths Gravity. The idea of 'potential wells' seems to work, but conceptually, and I think this might be your arguement against the linen cloth description, you only see one plane of that model with your own eyes, so it can be difficult to thin that that 'well' could face any direction off of the mass, and you arn't shown that anwhere, you just have to accept it, which I think is probably the point I have missed.