Published Aug 25. 2015 - 2 years ago
Updated or edited Sep 23. 2016

Preparation 1 - tubes

Cut the large tube at an angle as shown. Run it over the needle and do the same with a piece of inner tube. Make sure the two fit snugly together. Press the inner tube about 0.5-1 centimeters or less than half an inch into the outer tube
Martin Joergensen