ToddK
Contributor
I dive the standard analog SPG clipped to a D-ring, and don't have any thoughts of changing to AI. That said, it seems like AI wireless with a backup analog SPG may be redundancy overkill. The worst case would be if you had your wireless AI fail during a dive (from the posts above this sounds like a rare event). In this case, turn the dive and start heading up.
If you have a failure on the surface, you could always carry an SPG and a wrench in your save a dive kit to convert back to an analog SPG. In this way, you wouldn't have to buy a new reg to replace one that sounds like it is working for you. I've swapped the original yokes on my Scubapro's to DIN + yoke adapter, and then after buying doubles, to just straight DIN. All of these worked very well.
If you have a failure on the surface, you could always carry an SPG and a wrench in your save a dive kit to convert back to an analog SPG. In this way, you wouldn't have to buy a new reg to replace one that sounds like it is working for you. I've swapped the original yokes on my Scubapro's to DIN + yoke adapter, and then after buying doubles, to just straight DIN. All of these worked very well.