AI question - dive time remaining

[ti325v]

I dive solo deco on a.i. 2 atom 2`s a vyper in my bcd for back up. 1 transmitter, 1 spg, just in case....(2 more transmitters on my side mounts with spg on short hose if using side mounts )
It works GREAT.....want to surface with 25 bar in my twins ?....computers calculates air consumption for all deco stops...beep beep beep, ascend now...hang around watching the fish or sit on a rock for 30-40 minutes....surface....25 bar in the twins....
ONE failure in one transmitter in 4000 dives (3rd rate battery)... or if I am really paranoid I can put two transmitters on my doubles...and I have seen OOA with an SPG that showed 30 bar with empty tank....more then once...
I feel perfectly safe with my rig...you may not like it but it works...until I am dead.