Exactly, it would make special mines worthwhile no doubt. Building high level normal mines is fine and I bet we will be doing that all the time as long our geologists have a job. But, special mines are just special, both visually and functionally. People I believe keeps one or two of these mines making them sleep and adding extra deposits from time to time. I just want guarantee of some sort that they will not break down suddenly when deposit runs out. Thank you all for the support shown, even the criticism to this idea can bring up new better ideas to tackle this issue more efficiently for devs I hope.