Making the hinges
First I printed the knee plan out from
my computer, Then I used a glue stick
to glue it to the 1/8" hardboard. I used
a jig saw to cut the pattern out.
Wood glue the two hinge pieces together.
With the buttons now in, I cut a 1" dia dowel
1/16 shy of 5/8 and rounded the edges. This
gets glued into the one inch hole. I got
tired of trying to find a 1" ID washer so
I just made one out ov PVC pipe shown here.
It's not really the right width but who
cares it looks cool. Super glue it down
around the dowel.
Then slip a 1" retainer ring around the dowel.
I think this one is a little bigger than 1", but
it's still a tight fit.
Heres the finished slot.
Heres another test fit shot. You'll notice that I
did not cut out the insides of the knees themselves,
I could not deal with any more cutting, plus they
add some weight to the tread sections now and a
nice stong platform for the rest of the B9.