How do you take the caps of a Duncan Butterfly?
you dont. the caps are part of the axle i think.
Same way as with any other caps. If they can be taken off, use a suction cup.
Your going to have to pull the butterfly apart nice and easy, pull the axle out w/ pliers and then use a small screw or a small screw driver to pop them out.
I had to use a knife to make space and pop them out.