[galaxy-user] Adding custom genome builds to a galaxy instance

Hi Galaxy Users, I am trying to understand the process of adding new entries to the genome builds dropdown list and also ensuring these new genome entries are appropriately mapped to a reference sequence. I have been working through the code to work it out myself, but it would be helpful to get some advice from another user or possibly a developer who has experience with this process to avoid possible pitfalls. It would be a nice future enhancement to expose this functionality to administrators. Any advice would be appreciated! Thanks, -David