yeah when it comes to the exact cost- I have here like for the pressurizer I have like motors industry in case beams rubber and wire and that's mostly also trying to figure out like the spread of the resources right so that is kind of try to make sure that all the resources are used in equal amounts we're still working on that obviously as we add new stuff right and for the extractor we're thinking currently still being some plastic but that kind of depends if we want to balance it for the future I might completely overall this and just make it, aluminium-based anyway just for now and then later we can change this because I generally it has no big impact when we change the cost of buildings gotcha could probably usually move them as well to appropriate places in a progression anyway