Change FTP port via frontend

I'm using a different FTP port, by doing so i have to update the ISPconfig every update to keep monitoring working. (command: sed -i "s@checkFtp('localhost', 21)@checkFtp('localhost', 11111)@" /usr/local/ispconfig/server/lib/classes/monitor_tools.inc.php)

Would it be possible to have something in the frontend to change the settings in pure-ftp configuration as well as the backend for monitoring?

Cheers. PS. I love your product.