>>273139Pretty much all of my Lake Michigan dives are planned dives on doubles with a slung AL40 of EAN50.
My primary twinset is 2xLP72s...I bought'em on craigslist for $150.
I've learned that all the good stuff is deeper than 60 feet.
I go by the idea of rock bottom gas planning : 1 cf of gas per foot of depth. 120 ft dive? 120 cf of gas, minimum.