leftwich / topel — hat at
https://web.archive.org/web/20120119074219/http://vugg.wippiespace.com/vugg/collabs/hat_at.pdf

leftwich / topel — currents
https://web.archive.org/web/20120119084333/http://vugg.wippiespace.com/vugg/collabs/currents.pdf

leftwich & topel — hoop chord
https://web.archive.org/web/20120119070014/http://vugg.wippiespace.com/vugg/collabs/hoop_chord.pdf

scott macleod & jim leftwich
it is not long since conditions were worse than they are now
https://web.archive.org/web/20120119045840/http://vugg.wippiespace.com/vugg/collabs/conditions1.pdf