TPC design/performance discussion: Issues -overview Ties Behnke Mechanics design -overall mechanics tolerances for alignment Dan Peterson Ron Settles -fieldcage Peter Schade -advanced endcap Dan Peterson -overall structure Robert Volkerborn Michael Carty -mpgd+gate Akira Sugiyama -cooling Bart Verlaat Electronics -sAltro Luciano Musa Magnus Mager Antoine Junique -power-pulsing etc Takahiro Fusayasu R&D steps(incl. beam)2009-2012 -LP issues/plans Klaus Dehmelt -engineering R&D (LOI) Ron Settles How to make technical choices for 2012 proposal First ideas from LOI, discussion follows