Turning 41C into 41CV

[d b]

wojtek: You said the display is broken on the one you are considering buying, but you didn't say how it's broken. Dropping a 41 can snap the solder joints for the fingers that connect the display. If complete segments are blank, it's probably that. If the problem is a creeping black amoeba, it's a goner. The snapped joints won't be obvious but you can lift gently on each one with a sewing pin. A tiny soldering iron and some low heat solder is all you need, unless you have old eyes like me.