I managed to make some o-rings (the ones that go around the
threaded end of each atty / carto). Thought I'd share what I did. Maybe someone can improve on the method!
1. Using a condom from a carto (top of pic)
2. cut it down to about 1/4 inch (size is not critical). (second from top)
(if the condom has a .... plug you can invert the condom and snip off the plug)
*IMPORTANT* using a sharpie or pen- place a dot in the center of the condom (on the outer / bottom side). Get this as centered as you can
3. using a hand held / single hole punch- slide the condom over the post on the hole punch
*IMPORTANT* get the pen mark you made in the center of the hole of the hole punch.
(this may take 1 or 2 trial and errors to get the hole in the center) (third from top).
4. Punch a hole in the condom (fourth from top)
5. Take an old atty / carto (make sure it's completely dead* cause it will never work again after this step (LOL). Place the open end (non threaded end) into the modified condom.
Strike the threaded end of the dead atty / carto with a hammer. **Do this on a piece of old wood. 2 or 3 taps should cut the condom. Use OLD WOOD in case you hit too hard- you will damage whatever surface you are working on.
6. An original o ring on the left- mine on the right. It's not 100% centered but I have been using it without leaks!
*I'm not dead yet- I feel better!