Yes, please, definitely return him to your group and allow your group to rehome him. THis is the best for all concerned. They will have the contacts to help place him where he can thrive with these known issues, rather than him going to people who like how he looks (as an extreme example). You are doing a very hard, but very good thing for him but need to do it the right way by allowing your group to rehome him.
We had to return a hound and within 2 weeks of being back with our group was adopted out into the perfect situation for him - it was not easy but so much better knowing that he had the support of the group to place him appropriately.