Enclosed find "Pass 2" of the draft IBIS 5.1 document. The changes (also summarized in the readme, which will be posted along with the document): - All remaining yellow redirection marks have been addressed/removed - All ASCII figures have been removed - All tables and figures now have captions - Some issues with borders around table captions have been fixed - Section 6C has been reformatted to be consistent with the rest of the document (parts have been moved to Section 10) - Minor figure fixes implemented - Other minor changes as noted in the document Comments are welcome. - MM