yea even if he doesn't get much taller, the chances of him gaining weight past 16 are pretty good. I've put on alot of weight without height since then, sure alot is fat, but probably half is adult muscle that I couldn't generate as a teenager, and it's heavier than fat.
Some people are just skinny their whole life, but he can get a shorter Proto later it will be perfect timing with a job and better skills to appreciate it....
Remember too the 158 SL is about the same size as a 154 Proto in terms of rail length/effective edge.
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