Thorens VN-150 Performance Enhancement Package Performance Enhancement Package: VN-150 The performance enhancement package consists of the following: The plastic counterweight and stub from the RB-202 are replaced with genuine Rega stainless steel versions The felt mat is upgraded to a cork-rubber mat. This is my favorite mat since the lead mat went out of production. As Thorens does with the TD-160 Super series, I have added damping to the underside. The fabulous Bren record weight is added. I love the combo of the cork-rubber mat and this weight.