One of the biggest problems with rolling your own SUT is shielding them to get them quiet. In the very near future I plan on offering two options to help the cause of the DIY'er for shielding. One is a Steel box that has holes for RCA jacks and a ground lug. This can be lined with mumetal and copper foil for an effective enclosure. The other is a deep drawn mumetal can that can be placed end to end for a final shield. These can then be put inside a steel box for complete shielding.