There are 2 versions one with base plate the other without for me it holds very firmly and cannot slip but you can put a bottom plate in both for safety reasons
insert a leave from XCS
Anything can be used here as long as there is enough space for the small holes
Make the ring as wide as the test tube is
For the ring I have taken the length of the small pins to 3mm because the wood is 3mm thick and it should not protrude at the back
i measured the test tube and created a rectangle in the XCS so that you can imagine where the glass should be
and also where the ring holder will be placed
Kerf
I had to try out a bit here
my setting for the small holes is -0.10
this fits perfectly and holds very tight
but i have created a second version if you are unsure with a base plate underneath - this is then glued in place
everything ready - then go
the two open circles are very strong for me
but you can still glue them on to be on the safe side
put the ring on the glass
put glue on the tips
and stick it onto the leave
i use some knead glue - i don´t know what is the right english word
it is glue then you can shape it