Slim chance but......................

Did the installer leave your supplier on good terms? If he did, do they know how to contact him?

In all probability he would use the same default for all machines he installed?

Worth a try perhaps, as I cannot see someone setting unique defaults for each machine they work on and not documenting them?

Yes, Guinness is very much an acquired taste, and it needs carefully looking after, or it will make you unwell.

It was our wedding anniversary yesterday, so we went out for a meal. I had a pint of "Kipling Pacific India Pale Ale": pretty obvious where the Pacific came from, as it was definitely made with New Zealand hops. At 5.2% ABV it certainly hit the spot. Credit to the brewers as it is hard to make a decent IPA that strong.......4.3% ABV would be more typical.

I followed it up with a pint of Milestone Brewery's "Harry Potter"............they didn't say, but the style was definitely strong dark mild........it was 5.2% ABV as well, but it is relatively easy to brew to that strength with dark milds and porters.