Ha! Rory...I stole that cold iron for cooling off idea from your video series.
I'm glad you mentioned domestic irons. Some years back I saw the coatmaker at Thomas Mahon's 'English Cut' using one of those domestic reservoir irons. I thought then: If he's using one, I should be using one'.
I do have one of those huge irons (a Grossag made in Germany) and I do use it, but increasingly I find myself using an old 6lb AEG dry iron (1950s domestic) and a good domestic steam iron.
Horses for courses.