You can have bfgminer be your default miner when your Pi starts up. If nothing has changed it should be
sudo systemctl stop cgminer.service
sudo systemctl disable cgminer.service
sudo systemctl enable bfgminer.service
sudo systemctl start bfgminer.service
That is still correct Zanatos666, and that is what i was doing, except i doing a daemon-reload in between the disable of cg and enable of bfg. But the bfg still failed to recognize any of the devices. So i took Lukes advice and rebooted to restore the original drivers and i was then up and running with bfg!