long long ago I did a bunch of derlin stuff, it stinks.... I was making air seals for office chairs( prototypes) and some bushings for some other stuff( pully bushings* guides for watter tower painting curtin's and some other stuff too. it was a bitch doing the seals where it has to taper way down and be flexiable enough to seal with only air pressure from your butt....no not that air ...from sitting on the seat. it was also the bushing that held it all in place. all that seems like another life ago.