Hi Marco, Ever seen those yuppie glass containers for pasta, I've seen them here in Oz standing almost 3 feet high and 8 inches diameter - so you can get large glass forms if you insist on using glass. regards Robin in OZ. Tesla List wrote: > Original Poster: Marco McClean <memo-at-mcn-dot-org> > > Tesla List wrote: > <big snip> > > > coil form. The problem is-- where to get a big, perfect, glass cylinder? >