Im about to pour 16 yards of concrete for an HDX-689. Are there any real benefits to using 5000 psi vs 3500 psi concrete? Thanks... Rich N7TR ex KI3V, N3AMK, WB3JOV www.n7tr.com<http://www.n7tr.com> Telnet: dxc.n7tr.com N7TR DXCluster