Those are big sidemount tanks... Plan on diving them with He all the time?
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No, but I am planning on picking up a set of 85s at some point, I have 72s as well, but I hear they get pretty "floaty" at the end of a dive
If you want to try one out, let me know, I have a spare you can use if you don't cut on it. I have dove a pair of lp 120's and 2 stages with no problem. You will need a dry suit.
You should be okay in a dry suit with the HP133s but I think you'll like the smaller cylinders better and will find you get just as far because your RMV will be lower in smaller cylinders. I'd let you try mine but mine came cut and the waist strap is barely long enough for me and I have a 33" waist. Try OFG's. You might be able to wrap the waist strap around twice! ;)
He's in Tallahassee area.