On Wed, 30 Dec 2015 11:40:59 +0000 (GMT), Alan Dawes <
alan....@argonet.co.uk>
wrote:
>If you can source rubber of the correct thickness, why not make your own
>using a hollow hole punch - imperial sizes are available on ebay quite
>cheaply eg
>
http://www.ebay.co.uk/itm/BRAND-NEW-12-PC-HOLLOW-HOLE-PUNCH-SET-imperial-/141624831770
>Another possiblility is a cork borer as used in chemistry labs. If you
>have a school or college near you that has been teaching A level chemistry
>for at least 40 years, try contacting the lab technician as they may be
>able to lend you an imperial cork borer set.
This has the advantage of bein impressively d-i-y.
Also, it is possible to take a larger washer and make it smaller. I have had
little luck with cutting, as this makes a jagged edge. Had success taking a bit
of sandpaper and rubbing aorund the edge of the washer until it fiots well.
Thomas Prufer