What couplings are used?

B&B 3mm couplings are popular; they are unobtrusive, self-coloured, assembled just by bending (with care!) and feature remote uncoupling. Some prefer the operationally similar DG couplings for more robust use; other types include Spratt and Winkle. The traditional Triang type of coupling, in various forms, is still used.

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What motors and gearboxes can be used?