I know a fellow hobbyist,actually a fanatical LP collector/audiophile,who was very doubtful as to the effectiveness of this.He has a "fabulous" collection of vinyl.Actually,probably one of the best LP collections available.He did spring for the disc flattener,in question,and is head over heels "crazy" about it.It does everything claimed,and does NO damage to any LP he's tried.He has some extremely rare,and expensive discs which, when flattened ,were "better than new",according to him.
Looks like a winner,but not cheap!
Looks like a winner,but not cheap!