2004. I have completed a LWB separable touring bent based on the Wilkinson motorcycle circa 1910. It is made of four old bikes frames. It separates with 2 parallel sleeves and plumber's union coupling. The cost of this separating mechanism is nil in comparison to S&S couplings that are AUS$250 each. The handlebars are from a low rider bike. The rear air shock by “Cane Creek” is the most expensive item. I bought it in New Jersey a few years ago on special for AUS$200. This is the most comfortable bent I have built to date and ideal for long distance touring.
Later, I have modified the steering as there was a steer effect. I mounted a car steering universal joint for better turning and maneuvering.