Original poster: "Jeff W. Parisse by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jparisse-at-teslacoil-dot-com> Terry, In two words: money and tools. Most metal spinners max out at 96" diameter. Design considerations in the high end are often dominated by money and tools. Jeff > I note the Bill Wysocks and Goldka's big magnifiers have sort > of small top > loads.