I decided Earthrise Starscream needed some longer nullrays, so I made some out of Lego pieces. Here's the Air Commander himself with his new armaments. Here's a side view of the null rays And here's a breakdown of the null ray for anyone else that wants to make their own. Be warned, you may have to put tape on the peg to create friction as it can be a little loose on its own.
That works very well. If they could be cast as one solid piece, you could make them in all kinds of colors.