Your comments

Well done and thanks. This helps in many ways by being able to operate on the iPad independently, saving a round trip through the Mac for a lot of activities.
Yes, I have been using that feature for a while and it's very useful for the format conversions and other tasks - thanks.
GREP would free the iPad from being dependent on the desktop for this important feature. The ability to replace with back references, that insert a found sub-expression into the replaced string, is important for me so that files can be processed in various ways to accommodate the requirements of different iPad apps.