Instrument chinrest device, method, and kit customized as to proper height, rigidity, shape, size, and placement. An assembled chinrest can include a topper having pins; a lift having lift topper holes corresponding to receive said topper pins and at least one lift hardware attachment hole; and lift hardware having at least one threaded barrel configured to receive at one end a first end of an upper lift threaded member and configured to receive at a second end a lower lift threaded member, said upper lift threaded member having a second end to attached within said lift hardware attachment hole whereby, when attached to said lift, the device is able to be clamped onto a top plate and bottom plate of the instrument. The kit can include a plurality of toppers and lifts to select from, as well as the tools to determine proper chinrest placement and shape.