| Hi
I agree with previous - only comments
1) plastic is a poor conductor of heat take time to allow heat to permeate thro' tube wall and warm the sand
2) plug end with a tapered plug bit of broom shank, fill with dry sand compact by tapping lightly with a hammer shaft then plug firmly with rag.
3)the smaller the radius bend the more difficult - the back stretches/thins, the throat compresses/ripples
4)the heat will travel along tube - cool with cold water/rags to prevent it bending past your mark.
5) try to bend around a former paint tin shaped wood etc.
6) bend just past required angle then pull back to get the bore true
best of luck peter22 |