if i flash my CID51 to CID 52...can I still convert it back to CID51 if found to have problems?
You cannot downgrade the CID. Sounds like you might have been using the R1KG001 firmware. I also wanted to downgrade my CID on upgrading to this firmware. Had to wait for the new one (R8BA024). So far it's been very stable and I've not had any problems with it.