I removed my old toilet to replace it and the old flange was a brass ring and a lead flange bent over the ring the lead flange is connected to a copper waste line. I straightened the lead out carefully and removed the brass ring and replaced some of the floor. Now I want to put a new flange in. Can I use a "Twist and Set" PVC Toilet Flange inserted inside the existing lead/copper pipe? Or should I put the brass ring back and bend the lead over the brass ring again? The finished height of the flange would be about 1/2 inch below the finished floor if I did this. Using a "Twist and Set" I could get the flange level with the existing floor.