History of past HW upgrades?

[Rufus McDufus]

In terms of actual upgrades as opposed to new product launches, that could be it. Power inlet filters were changed on the current range at some point due to them making burning smells and degrading, oh and I think early remote controls in the 110/170 were prone to developing faults and had some changes, but I suppose they're just a parts change to fix an ongoing fault.