1.Ya know, whenever somebody gets it wrong in their first sentence that kinda kills any credibility they have no matter how many good points they may follow up with.
Would you care to expand on what precisely you found wrong with that statement?
The use of the scooter in the DIR configuration is important even when diving without a scooter because it influences a number of configuration choices which don't necessarily make sense otherwise, including light placement, stages placement and ring placement.