[Plugin] [TechTree] - 0.22 - Realistic Progression LITE V0.17a (Pre-Release via TreeEdit) | Mods | Scoop.it
EDIT: This 'pre-release' is only available via TreeEdit, it should be up shortly. But you can still give it a go! I put the instructions in one of my first replies below. Cheers! Dont' forget the mods and tweaks!

Via Chris Cartmill