> something else like a flexible carton etc. to act as a 'puffer'. I think this wheel has been invented already and is covered in the archives at: http://listserv.albany.edu:8080/cgi-bin/wa?S1=bee-l I believe the search target will be "Blaster" Yup, that's it: http://listserv.albany.edu:8080/cgi-bin/wa?S2=bee-l&q=Blaster&s=&f=&a=&b= Aaron Morris - thinking archives, use 'em early, use 'em often!