Quote: (Originally Posted by
Audimaniac)
Basically, without opening up a huge can of worms (hence posting here and not on YD)
Coward
I am sure someone better qualified than me will be along shortly to answer your question but I am guessing one of the reasons is standardization of equipment - but I am probably wrong
(I frequently am) 
I dived inverts for about 3 years up to 18 months or so ago (Sept 2006) and looking back the only reason I did so was because I thought I couldn't shut the valves down and there was so much on YD about it when I joined, after seeing someones set on a YD I decided it was the best route for me.
I look back now having had some "proper" training and encouragement from here that it really wasn't the issue. Also I see photos of my kit when it was inverted with hoses everywhere - it just looked like a bag a cr**
