"The Infernal Machine
Gwent was in 33cm and 16cm sizes and built by Martin Bower. Large sections were built for the Eagle and moon buggy lift. The large Gwent was made from a motorised aluminium tube built by Nick Allder, with hardboard steamed over by Bower. It was difficult to roll, and was broken by a frustrated Nick Allder after filming completed.
Bower built the three laser tanks on the chassis of Tamiya Chieftain tank kits (with electric motors to drive the tracks) and parts and decals from a Polaris submarine kit. They were 33cm x 15cm, and the guns were manoeuvrable. The one with the Eagle-like nose lost the rear entry hatch (from the 2001 moon bus) when Bower used it to make the travel tube for Into Infinity. The one with the bubble cockpit and sloping nose has had a new front section to the barrel attached after the original was broken at Alton Towers. The two Gwents and three tanks were built by Bower in 12 days."