Hey this a really cool mod,

I am intending on using this as a stand alone to vanilla space age for now :) Are you intending on giving the rigor module any downsides? like speed/productivity reductions for balance?

Thanks! It does increase energy usages, which is technically a downside; but the main cost is just that a rigor modules takes up a module slot. Rigor modules are definitely a bit OP in vanilla SA (especially for holmium ore), but there are also so few vanilla recipes that accept them that I think it kinda of evens out.

I designed rigor modules originally for my planet mod (Planet Crucible), and Crucible's crafting machines and recipes are very explicitly balanced around rigor. And I'm hoping that other modders who find rigor modules interesting might have some ideas of how to use them in designing a production chain.

Anyway, let me know what you think after trying them out in your factory! (And let me know when you find bugs. There are lots of those.)

I have a very "mod needs to be like vanilla" philosophy. So less is more for me. I am looking at the Crucible mod which looks great. But i do like to pick apart other peoples ideas and make them work for me :) I think you have some great ideas here, the module is very clever.
As for the Holmium problem, yeah i noticed hahaha. But i might play around with a few ideas for just space age, but energy increase as a downside, as we know, is never really a downside in factorio hahaha :) Considerinf there isn't a reduction to Productivity in Factorio, maybe vigor can be productivity's opposite. (kind of like how speed and quality are opposites to some degree)
Is there a list of recipes it hits in vanilla? or is just any recipe that yields probable results? and does it ALWAYS increase the unlikely result (eg seeds, enriched uranium, holmium?)

Yes, generally rigor increases odds for the lowest-probability product, but there's an interface for mods to specify a product manually. And in fact this mod has to specify holmium ore, because there are a few scrap recycling products that all have a 1% chance. For vanilla the only recipes are uranium processing (U-235), yumako/jellynut processing (seeds) and scrap recycling (holmium ore).

A productivity penalty is an interesting idea, though (like quality) there'd be no effects from net negative productivity. It is a more serious tradeoff than just energy consumption. My main concern is that a prod penalty could devalue the first level or two of an infinite productivity research; for example if all my scrap recyclers had -10% productivity from rigor modules, the first level of scrap recycling prod would do nothing. I have a strong preference to avoid that kind of thing since it feels like a punishment. But it's too intriguing an idea to not take seriously, and maybe the buildings with +50% productivity built-in offer the perfect solution.

In the end I think most of the potential in rigor modules will be with modded recipes. I do really like using rigor to kick-start nuclear power or Gleba soil production, but the only vanilla recipe where rigor modules can help with science is scrap recycling. And even there, if you're using legendary prod mod 3s then holmium is no longer your bottleneck wayway!

Crucible's recipes are designed for rigor, and I'd definitely love to see other planet mods (or content mods generally) run with the idea. But I'll bet there's also lots of potential for some tweaks to vanilla recipes to utilize rigor modules.

Yeah totally agree. I think your planet idea makes sense, it just would be nice to take the module from crucible and have it mix things up for the other planets (as the other modules do). Rigor would work well in vanilla if resource was low, and thus productivity and speed was problematic for rare product chances. Or if the product you don't want is actively problematic, and increased speed and productivity causes massive waste to remove.

But anyway Looks cool, I'll think about it in the background. Cool ideas you got

That being said, you could have it alter the advanced oil cracking for great Heavy Oil ratios. Could be useful sometimes.