Have you looked at the Kanati Quivers by Anawaakee Archery? They strap on and remove easily and are very secure when on the bow.
By the way, I experienced the same as you did when I mounted a quiver on my bow. I bareshaft tuned without the quiver, cut arrows/fletched and everything was great...excellant arrow flight. I then installed the quiver and then started shooting which resulted in poor arrow flight. In the end it cost me a 1/2 dozen more shafts for retuning. Oh well, lesson learned.