Hi there, Rob and Bob,
That looks like a useful bit of kit.
You guys must have bigger workshops than my 12' x 8' though!
A historical comment, if I may: The rating plate in your first photo, Rob, says that Alexander is 'a Coubro + Scrutton Company'. Before I retired I worked in radio and electronics and I also hold an Amateur Radio licence. In both professional and hobby capacities, I came into contact with a firm called 'C & S Antennas' who, as their name suggests, designed, made and erected radio aerials. These were of all shapes and sizes but included the tall guyed lattice towers used by broadcasting companies.
The connection that I found interesting was that Coubro & Scrutton, their parent company, were originally in the business of masts & rigging for tall sailing ships. You can see how some of those skills would transfer from the old to the new.
