The gun turrets were motorised using canibalised RC servos with 360
degree rotating cams.
Now i'm not gonna stand here and say it's an accurate reproduction of the effects model but it is the best i could do at the time.
Them Studio 2 ones are far superior to this from what i have seen but
bear in mind it was going to be about another 7 or 8 years before they would make an appearance when i made this.