Harnesses, buckles and seat detail in one box: that is how upgrade sets for 1:32 and 1:35 helicopter models work, each drawn for a single named kit. At large scale the restraint system is the most conspicuous detail of an open cockpit, which is why sets cover the Viper, several Apache generations, the early Cobra and the crane-bodied CH-54. Components follow on from one another and fit without modification.
A cockpit fitted out this way shows to best effect behind the glazing of the big machines in 1:32 helicopter kits and 1:35 helicopter kits. Smaller scales and etch-plus-mask combinations are collected in helicopter upgrade sets. Work fabric belts between your fingers before fitting; they then drape instead of standing proud.