Thank you for the feedback on the banking gump. The reason for the conversion rate is based both on technical limitations for the values stored and also because we didn't want to entirely redefine how items were priced. For the vast majority of players past, present, and future, they will continue to use gold for the majority of their transactions. We didn't want to change that. Platinum only comes into play for those high value transactions which were previously cumbersome and difficult to transact. The gump for selecting which mastery path should be accessed via the context menu on the book, and then the abilities accessed by double clicking and cycling through the pages.