[mickmate]

A collapsible column is about worthless alongside a 4" tube ladder frame. You couldn't compress that frame enough to push the steering column into you. It is simply a bushed tube with a splined shaft inside it at the top connected to a bottom shaft via a universal. The universals are a 3/4-48 spline as in MG Jag. The newer universals such as Borgeson and Flaming river are really nice but are a heavier needle roller type and are also longer and fatter than their predecessors.