Please don't fight

, I myself usually quarantine for at least 15 days, and ideally a month or more.
I would have at least wanted him quarantined for 15 days, but he is just an escaped artist.
Yesterday in the evening when I went to check up on him he wasn't in his pen, I freaked out and started to frantically search for him and found him on the other side of my property sitting on top of my run/main cage.
Knowing he is able to get out of his cage I tied him to a tie cord that was attached to a stake in the ground thinking it would keep him in place but to my surprise he escaped again

, I found him outside of my run still tied to the tiecord and stake, he had dragged it along.
Now since he looks healthy and has interacted with my other birds twice on accident I was thinking of just introducing him to my flock, I have treated him for worms and lice(I do this on the first day I get new birds)