from which fiberglass shells were pulled. The "wand" had an extending barrel mechanism and the electronics were quite advanced for the time. They were then finished with various surplus 1960s resistors, pneumatic fittings, hoses and ribbon cable, and surplus warning labels and custom-made metal fittings. The overall weight of these props is said to be around . These "hero" props were substituted in stunt scenes by flimsy foam rubber pulls from the same mould. The proton packs have a lightbar with 15 blue scrolling lights in a box on the left-hand side and 4 red lights in the circular "cyclotron" portion of the bottom of the prop that light up in rotation. The "wand" also featured numerous light features; the most elaborate versions had fluorescent bargraphs, incandescent bulbs, and strobing flashes in the tip for the visual effects crew to synchronize the 'streams' to. The GB1 Hero proton packs were fiberglass shells mounted on aluminum motherboards with LC-1 ALICE Frames and straps. These packs had many aluminum parts on them, including: aluminum Ion Arm and cap, booster tube, injector tubes, HGA, vacuum line, PPD, Beamline and filler tube, as well as the N-Filter. The wands for these packs were also fully aluminum, minus the resin grips. All these external parts were pop riveted to the shell, which was then, in turn, mounted to the motherboard via L-Brackets and bolts at the four corners of the pack. The GB1 stunt packs were packs that were cast in foam to be worn during physical stunts performed in the film. Many of the attached pieces of the hero packs are cast on to these packs in foam. These packs also featured static lights and were attached to plywood motherboards with different straps compared to the GB1 heroes. Other than the bumper, wand and hosing/ribbon cable, everything was cast into the foam shell of the pack. Some packs from Ghostbusters were used in the follow-up Ghostbusters II; these packs were slightly redressed with a black crank knob and thinner ribbon cable. The angle of the gun, or "wand" mount was changed to pitch forward slightly, in order to make the prop easier for the actor to use. In addition to these redressed props, one of the originals was hastily cast as a buck to produce basic lightweight "midgrade" props (as a solution to complaints by the actors about the weight of the original prop).