TiCo 1.8.9 is in Unstable as well...as far as I can tell, there is no way to auto-repair or repair using power at all.

There's a lot of cool material-based modifiers, though (protip: Knightslime plate on an Obsidian Excavator/Lumber Axe is an INSANE combo, since Obsidian mines at Cobalt level and Knightslime's "Unnatural" modifier massively boosts harvest speed when harvesting blocks of low tiers), and since you can replace tool parts at will there's much more room for experimentation than in previous versions. I really dig it.