I think that was me - certainly that's what I did when I had to do some work on mine. It's pretty straightforward: tape a bit of rope of a similar diameter to the bolt end-to-end with the bolt. Pull it through as you take the bolt out, put a knot in it, and then pull the innards of the system out the end of the mast.

To reassemble, simply pull the rope tight, and slide the bolt back through.

Paul