Don't want to pay for oxy cylinder rental so I don't do my own brazing, but I'll set it up and take it to my local engineering workshop if I need to do something. I have some argon so I can do alloy MIG welding on racks and stuff. Everything else I do myself. Helps that when I was a kid my friends and I had easy access to the local rubbish tip and a big brother who also raced to show me how to build wheels and suchlike. I don't think our bikes stayed the same for more than 2 weeks at a time.