Start in November 2023 Done in March 2024 Based on: Del Gesu Plowden Top Plate: Wight: 59gr Density: .38 gr/cm3 Mode 5 ferquncy: 370 hz. Lenght 351 mm Back plate: Weight: 110gr Density: .57 gr/cm3 Mode 5 ferquncy: 355 hz. Lenght 351 mm