RSS downloader for Transmission?

Hallo.
First of all, I’m from Denmark so my English will not be perfect, but understandable.

I own the Asus RT-N56U router with PADWAN firmware (3.0.3.6-061). So far so good! I like the firmware and i provide good speeds.

I have e 1.5 TB USB2 drive connected, where all my torrents goes.

I would like some sort of RSS downloader to work with Transmission. I have done some research and FlexGet seems to do the job. It even has an experimental web interface.

I have looked at this guide: http://flexget.com/wiki/InstallWizard/OpenWrt

Do you think it will work?

My goal is:
- To have a low power bittorrent setup
- Automated to some extend
- Stable

Router is running:
- Transmission
- VPN
- FTP
- SMB
- Entware is installed

Another alternative: I have a Raspberry PI running XBIAN (debian based), that i could use to download the torrent files, and transfer them to the Transmission watch folder. I would like to avoid this, since i think the Pi has enough to do playing 1080p.

My Linux skills are not the greatest...

I hope you can help me. :D