@Dutch-Mic Hey bro ! The method that you are heating the glass tube i think counts as the indirect one. Anyway ,the idea is to move the torch from top to bottom from all sides.Even heating is the key. It is very hard to overheat it with vapman lighter,so make sure you take your time, give it at least 30-45 seconds of torching.
Thank you very much for your quick answer @Abysmal Vapor! I thought I needed a creme brulee torch (don't own one the moment) for the indirect method, glad to read I can use the Vapman torch.
Really need to be careful with experimenting though: my wife could go into labour at any moment and it wouldn't be very practical if I'm sky high at that moment
Edit: To be clear, the contractions haven't started yet, I'm not vaping while my wife's in pain!