The Gorse Fox has been working in the workshop/garage all day. He has had the chance to work with Two Hats. We had come up with the idea of installing an additional joist across the garage. This would provide additional support in the middle of the existing (longitudinal) joists. These existing joists are so long that they are actually spliced to provide extra length. The additional lateral joist would lift and support these - and will give the Gorse Fox a fixing point for his pulley.
It was nice to see that the whole thing worked as originally planned and the whole thing folded in to the 4 inches that had been allowed.
Actually we spent the whole day solving the problems and installing the lateral joist for the Gorse Fox. We ran out of time to install a similar joist for Two Hats, but we have now solved the problems and know what we need to do to repeat the process next week.
We did discover how hard the walls were... and finished off two drill bits in the process. Needless to say the whole thing took longer than expected, but these things always do!