Hi all. I'm looking for advice on warmth for diving Monterey. I was wondering if a well-sealed 3mm suit with a 3mm shorty over it would be enough warmth. Anyone try this type of layering? The other alternative might be the 3mm with another 3mm over it. I wanted to try this because my 3mm fits so well, and I believe the layering over a well-sealed suit would be a good alternative to a single thick suit. Opinions please?