I’m lending a friend my huge Guardian Serviceware turkey roaster for the holiday so she can cook her turkey on top of the stove. I’ve heard a lot about glass top stoves and warping pots and pans. She doesn’t cook much and I’ve never used a glass top stove. Any advice for the highest temp setting to advise her to use? Also any concerns about such heavy cookware causing damage to a glass top stove? Thanks for the help!