I need advice as to what type of bcd to get for my 11 year old grandson who just finished his Jr. OW, and who I am going to take on a cruise to Coz, Roatan, and Belize later this year. I know we can rent the BC for the trip, but also know that with rental gear he might wind up with a bc that is too big for him, and may be a different brand at each location. I would like him to have as much consistency/familiarity with his bc as possible so he can really work on his buoyancy without having to deal with a different bc/buoyancy characteristics at each dive location. I was hoping he could fit into my wife's Sherwood Avid BC (sm), but he is going to need a XS or XXS size for his frame. He is pretty tall for an 11 year old, almost 5', but is thin and wiry (27" chest, 23" waist, and 75#) with hips that do not easily acommodate a weight belt. So, I am looking at getting him a relatively inexpensive, weight integrated bc that he can use now and still have room for growth. If I was going to buy a new bc for myself, I would defitinely go rear inflation or bp/w, but when I discussed that option with a couple of LDSs, I was told I might want to rethink that for him because of his size and weight, the rear inflate bcs are going to tend to push him face first into the water, and that might not be a good thing for a young, very new diver doing first ocean dives. Now these are LDSs that carry all styles of bcs, a wide selection of brands, and have a lot of experience teaching kids, so I did not get the impression they were trying to sell only what they had in stock. I am currently looking at a new Aeris Biojac xs jacket bc ($223) for him, but would appreciate any comments from instructors that have worked a lot with kids as to what seems to be best for kids. Thanks in advance.