Some fans have been working to make accurate plans of the Slime Blower, one of the most neglected props from the film. Christiphern, GB Dan & gbmasterman set forth over the summer to create the plans, and I think they followed through with some highly accurate drawings. They give a few pages with measurements and a good amount of information, including the Singer label that is found on the Slime Blower (and Ectomobile). Thanks for the plans guys! You can view them here:
http://www.gbprops.com/plans/compilation_blower/