To wlminex: Thank you; both the mechanic’s and effect are correct. The core does go through a metamorphous as I described. And the new material is less dense as I described. You can give the zones any name you like; I do not prescribe to their use for concerns that I buy in on other aspect that are carried with that name. Yes the expansion is moderate, partly caused by the very slow rate of conversion. Which is fortunate for us, there is enough violence as it is.