I have my pony attached to my main tank.
The 2nd stage is clipped to my chest D-ring.
The tank is always on.
For a while I ran an SPG from the pony - but recently found a cheap transmitter.
In both cases, in an emergency, I'm not sure why you would be concerned with handling the pony?
You need to ensure it has enough air (which you would do pre-dive and during dive) and you need to ensure quick access to the pony's second stage.
For a while, I even had the pony's second stage around my neck via necklace. But now its clipped off to chest d ring.
Reaching for my pony second stage is akin to reaching for your octopus on a traditional setup.
I use the Shark pony mount.
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