I am just about to start diving doubles and would like some experienced advice. I have used a Halcyon eclispe 30 with an aluminum 80 and enjoyed it for its simplicity and comfort. I am very interested in tech cave diving and a buddy was selling his steel HP120s so i bought em after putting them on my back. They didn't seem to bad at all weight wise on dry land. The real question is what amount of wing lift I will need and what wing would suit the setup best? After doing more research I have come up with this.. The tanks are approx -11.8lbs buoyant when full, I will be using for the time being a 6lbs steel backplate. Total weight of just that would be -29.6lbs Therefore 30lbs of lift roughy to float without me and extra gear. I will be using a DUI cf200x drysuit with this setup and I do live in Maine so cold water is the norm. I know 90lbs wings are rediculous and I completely understand why. I don't want to be a human lift bag. So I think I should be looking between 35-45lbs wings. Is this a good start? I will eventually be getting into stage bottles and such and taking a tech course. Your input is appreciated.