Whats the best way to reload node positional and size information?

I'm currently itterating through all my nodes and saving an id with position and size.

Then on reload once all nodes have been loaded and parented and added to the diagram, I am reading back in the position and size and setting these directly on the nodes.

However I'm getting strange results with adding nodes back into containers esp where a container is inside another container. Its almost like the nodes are missing an offset even though I think the positions I have are absolute document position and not local relative positions to the container.

any help on this matter would be great.

regards

Brilliant it did thanks