Dear Colleagues, The latest version of the vacuum system has been posted to the web pages. There is a PDF section, a 3D PDF, and a Step file. Enjoy. Cheers, Douglas 26-415 M.I.T. Tel: +1 (617) 258-7199 77 Massachusetts Avenue Fax: +1 (617) 258-5440 Cambridge, MA 02139, USA E-mail: hasell at mit.edu