If a person has bad luck or an accident with the equipment, in this case a 3 D printer, it is very welcome if the parent company has spare parts and upgrades in sufficient quantity to meet the unfortunate ones.
From this point of view, I welcome the Additional charge, when Mrs. Monica sets the price and you just pay. But it would perhaps be better to sell things - as spare parts and upgrades, so as not to burden Mrs. Monica too much...;-))
The motherboard, which I was forced to buy again due to ...