It does need to look like something that belongs in the WC universe, though. Actually, I suppose the Dagger does (since it looks a bit like the Stiletto), but the Snipe doesn't.
Well, I'm basically assuming that the cockpit bubble is about two metres long (actually, I suppose for a one person fighter it should only be about 1, 1.5 metres long) - in which case, the fighters both end up being too small. Try to keep the light fighters at roughly 10 metres of length.
As for converting them into WCP, I'm really not the expert on that. I'd point you to KW's tutorial, but unfortunately the site on which it was posted is down. So, all I can do is point you to KW
.
Finally, the engine nozzles - I don't know if they're too big or not, having not seen them, but keep in mind that we do not at this stage know any way of making the WCP engine flames bigger. Thus, if your nozzles are bigger than the flames, you'll be in trouble
. As a rule, it is better to have two or three small nozzles rather than one big one.