after witnessing a variety of ways to stop tube collapsing down while rolling a coil, with mixed results, I thought I would share a tip with you scruffy lot :lol: :lol:
I anneal enough tube to make the coil then pack it tightly with sand blasting abrasive grit, so long as it is kept dry it flows back out easily with a rolling back and forth motion , takes about 5 min. to get it out,and its ready for re-use, I reckon it will last forever,
Packing it in the is best done with vibration, a cordless drill with a bent bolt in it does the trick, I have the advantage of living on a high steep block , so after I crimp over one end I lay the tube over the batter and fill it with a funnel taped onto it to seal it and pour in the grit, touch the tube with the back of the vibrating drill to pack it and repeat this until the tube is full and crimp it over to seal up the end , then roll it up , easy, cut the end off and pour the grit out , flush out with yhe hose and your done