I've found some more issues related to the Space Age DLC, specifically with the 3 enrichment recipes added by the mod.
All 3 of them are able to accept Quality modules, which opens them up to a huge exploit. The default Kovarex already bans quality modules, since it makes no sense on a catalyst recipe and it could be easily abused to obtain huge amounts of quality uranium very quickly. The process of getting quality materials is supposed to be very wasteful, as it usually involves the recycler, which has a 75% loss rate.
Another issue is related to Productivity. Although the recipes already ban productivity modules, this can still be circumvented by using machines that apply productivity on their own. And it just so happens that this feature is very common across Space Age and its mods. For example, one of my mods adds an advanced centrifuge with 50% productivity.
The actual problem here is how productivity is applied to the recipes. With the default Kovarex, productivity is only applied to the net products of the process, which is a single piece of U-235, while the remaining output of 40x U-235 and 2x U-238 are disregarded. As such, 100% productivity only increases the amount of U-235 obtained from each cycle by one.
However, the advanced Kovarex and both Californium enrichment processes apply productivity across the board, effectively creating new materials from thin air.
