[Fyron]

So, bottom line, we need to account for the 5000kt ships in a way that is considtent with the rest of the ships, or else they become disproportionately effective. The only way I see of to deal with this is through some "gawdawful" component that gives a huge movement bounus.

Lowering the big ship's engines per move has the same effect, and eliminates the need for a special component (which violates the QNP principles equally to the lowering of engines per move anyways).