OzFclass

Daveh has it perfect, keep the draw off rate appropriate, weather conditions will also effect that, I use a disposable Mapp cylinder which will do at least a 100 cases so far without changing, the main concept is hotter quicker to prevent heat soak from reaching the base, not hot enough will increase variability of the affected zone, whereas too hot will scale, it’s actually a pretty forgiving process

Thanks Daveh - I’ll try your technique