An HCS jig
Look away now if you've ever had to make a jig for a telescopic fork set-up, supporting some great peice of tube in space, at a funny angle in one plane and vertical in the other. This is what I'm hanging a Voyager Mk11 HCS unit from. Four holes, two pins. And two of the holes are just a convenient way of locating some structure. All the holes are vertically aligned, the pins horizontal. No angles were harmed in this process. Took me nearly all day to make. Remind me, why do people use telescopic forks anyway?