Su5eD Tree Cutter

Nope, output tiers are hardcoded. You can use 2 reactors though

The Wind and Water Mills have been replaced with Kinetic Water and Wind generators, so use those instead.
(Quote from ian)

Actually it's quite reasonable. IC2 Classic is a different mod with old-style IC2 content, including the Mills.

Are you looking for the exact sound used in IC2, or the sources of it?

I think the tier is displayed when you hold shift, and you can calculate voltage from that