They fit so precicely, even without the rubber gasket, that I was getting compression with just a bit of the petroleum jelly.
It was not enough to raise a spark in the charcord though, or this would have been too easy!
In fact the hardest part of building these, with the components I finally settled on after watching every utube I could get my hands on, and checking the availability of the items local to me, was cutting the groove deep enough for the o ring.
This was very "trial and error" and rather time consuming compared to the rest of the process. I got it down after a bunch of them and the last one went pretty quick, so it looks like I beat the learning curve after all!
Here is a picture of the five I did for the "Boys" in Brandwyn's family (she is making jewelry for all the girls) I am going to varnish the wood and put the leather on and stichit up like the one up above, and the tinderboxes are almost finished. I will put up a pic of them later tonight.
