Meng_Tze:And it is fun too. This extends the hobby beyond just diving, but the logistics behind it too so to speak. All involving...
And like In-Cave diver mentions, with more than about 5-6 regs, it becomes more economical to do it yourself
The hobby aspect of it is as important as any other aspect. I shoot a bow and I make my own strings and arrows and have been trying to find time to build my own bow. I make knives that take me HUNDREDS of hours to make even though you can get a decent cutting tool at walmart for $10. There are lots of similar things that I do because I can and because I like doing them. LOL, some people put their car in their garage. I have gas mixing equipment (temporarily without a compressor though), forges, anvils, welders, drill presses and so on. I've known people who build their own racing cars, motercycles and airplanes...only in diving is there someone trying to tell you that "you can't"
What is it they say? Believe you can or believe you can't, either way you are right.