I've completed the entire quest line for dawn guard, I'm just wondering where Gelebor is so I can go back and get my "thingmys" upgraded?

The thingmys is to avoid spoiling it for peeps

Hes where you last saw him, where you killed his brother. You can fast travel to the forgotten vale and you will be near a a teleportal thing, choose the sanctuary balcony option i think it is.

Ahh, I just forgot the entire location of where he was at! Thanks bro