Weight at the bottom end is to be avoided, pitched as it is so far from the C of G (or centre of gravity). Nor indeed did I like those circular cut-outs that are so wasteful of material. Finally we have to consider passenger ingress, for even if we view this as say a two-thirds scale model, that still means the original box was around eighteen inches (forty-five centimetres) high, which is a big ask for people to step into at all easily.
Accordingly I've dropped what we shall call the 'foot-well' to half of its original height and left the side-panels off altogether. Yes, I would use them were they carbon-fibre sheet (and without the cut-outs) but no, probably not worth the added weight here.