I'm kinda suprised that no one has pointed this out, but you took two traits, meaning you need a major disadvantage, not a minor one. So just take the one that limits your use of vehicles (flesh over steel) and you should be fine.
I would also suggest you take the trait that allows two assault weapons, since you are right there, so melta-guns and rapid firing death from plasma guns might be more helpful if you are up close and personal.
Hope this helps
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