Original poster: "hoggwild89 by way of Terry Fritz <twftesla-at-uswest-dot-net>" <hoggwild89-at-netzero-dot-net> I am planning a flat coil, using 1/4 inch copper tubing. I want 15 turns with .75 inch space between each turn measured edge to edge (or 1 inch center to center). Sound OK ????????