KC2 was actually just one crystal model, the pretty much were all the same with different textures
and sizes. Transparency I don't know. I've stayed sorta on top of the cloaking threads in the last few years
and I have made a completely clear texture for one of the powerups.... if not I imagine we can fake
a semi translucent texture without a great deal of issue. Refracting light inside a model - I don't think FS2's lighting
was designed for at all.
Tractor beam Backslash did years ago, both a pull and push actually.
Corona device is a little funky, not because of the size/blast image/instant splosion... but because
the darn thing shouldn't cause you damage. None the less, I think there's a weapons flag or something
that will make it work. If not I'll make it into a blast wave with a min and max distance damage.
Sappers are kinda easy really, most of their functions are already in FS2.
Charging weps like the solaris are actually harder, but I know there's some threads around here about
that specific thing.