Original poster: "Shane Rusch by way of Terry Fritz <teslalist-at-qwest-dot-net>" <str-at-itol-dot-com> Hi all. I'm looking to step up to some larger sec. form's, 6" and larger. What is the best material ? My current forms are all 4.5" ABS sched. 40 pipe in various length's, thank's Shane... Arcin in Wisconsin....