check my logic?

[loosebits]

Yes, absolutely it has enough gas, as does an AL40 of 50%
And the general rule is if you need more deco gas, take 2 gases (50% and 100%) rather than a big bottle of one (this helps with lost deco bottle scenario and reduving rock bottom etc.)

With my deco SAC of 0.6 SCFM, I need 33 cubes of 50 to run that profile according to v-planner. I'd like a little more gas for contingency. Since I don't have a LP45, I'm stuck using an 80 which really isn't too bad and it will help get me used to it for when I start diving stages. I haven't started doing the types of dives where bringing another deco mix is really worth the added complexity.

 

[limeyx]

With my deco SAC of 0.6 SCFM, I need 33 cubes of 50 to run that profile according to v-planner. I'd like a little more gas for contingency. Since I don't have a LP45, I'm stuck using an 80 which really isn't too bad and it will help get me used to it for when I start diving stages. I haven't started doing the types of dives where bringing another deco mix is really worth the added complexity.

I've lost the deco profile now. Generally I assume SAC 0.5 on deco, and that I can get 30 mins on an AL40 of 50% starting at 70 feet.

If I fall a little short on the 10 foot stop, then I can just go to back gas.