I hosted a game earlier with ~10-20 players to try out your mod, and we ran into some things we thought were a bit strange.

1) the initial recipe "basic impure extraction 1" appears to be uncraftable in any machine.
2) Saphirite Ore focused extraction 3 and Stiratite Ore focused extraction 3 appear to only be usable in a burner omnitractor. You can't use it in electric omnitractors... Why is that..?

Great thanks for trying it out, those are not intended and I will sort it out during the day

We also found some very confusing costs for the t2 electric omnitractor with bobs mods. The t2 is more expensive than the t3, because it uses titanium bearings instead of (presumably) steel bearings. The t3 requires aluminium, which is easier to produce than titanium.