Feature Requests

I still generate paper bills, the less paper I use the better, I don't want to have to print 2 or 3 pages for every client. It would be much better if I could select to have statement pages included in my general flexible template settings, but only have them generated when a client has a past due balance. Alternatively, allowing the past due balance to always be shown on the "time details" section of the main page.
Essentially, I am asking for an if/then function for statement pages i.e. if past due balance, then generate statement page; if no past due balance, then do not generate statement page.