Saying that you have always needed a certain amount of weight or showing a logbook will not do a lot of good. Most divers in the inexperienced range--and even getting into the experienced range--are overweighted, sometimes seriously, so a dive operation will likely assume that you are just asking to carry on a tradition of being overweighted.
I was once doing OW checkout dives in fresh water with students in 7mm suits. One of the students announced that in preparation for the class, he had done all his pool work in a 7mm suit, and his pool instructor had worked carefully with him on weighting, so he knew for an absolute certainty that he needed 22 pounds. I looked at his slight stature and build and thought "no way." By the time we were done, he was happily diving with only 10 pounds, and he was thrilled by how much easier it was to dive that way.
In contrast, I have known two very experienced and skilled divers who absolutely needed more weight than I would have believed possible. Both talked about experiences where people refused to believe they needed that much.
So do you need as much as you think you do? I don't know. I would love the opportunity to check you out. In the meantime, my suggestion is to ask for weight this way: "In my experience, I need more weight than people think I should. The amount I am asking for will seem like a lot, but I assure you that I do indeed need it."
Maybe they will believe you. Maybe they won't.
I was once doing OW checkout dives in fresh water with students in 7mm suits. One of the students announced that in preparation for the class, he had done all his pool work in a 7mm suit, and his pool instructor had worked carefully with him on weighting, so he knew for an absolute certainty that he needed 22 pounds. I looked at his slight stature and build and thought "no way." By the time we were done, he was happily diving with only 10 pounds, and he was thrilled by how much easier it was to dive that way.
In contrast, I have known two very experienced and skilled divers who absolutely needed more weight than I would have believed possible. Both talked about experiences where people refused to believe they needed that much.
So do you need as much as you think you do? I don't know. I would love the opportunity to check you out. In the meantime, my suggestion is to ask for weight this way: "In my experience, I need more weight than people think I should. The amount I am asking for will seem like a lot, but I assure you that I do indeed need it."
Maybe they will believe you. Maybe they won't.