Metal and Stars assumes all machines have undefined module categories, meaning that the new "overclock" category is automatically compatible. However any other mod that assigns module categories to machines means (e.g. Hydraulic machines, Arcanyx, etc.) that the list is no longer null, and overclock modules can no longer be inserted. As the overclock modules are really productivity modules with rebalanced values, I would recommend putting them into the Productivity category within item.lua, to ensure they can still be used everywhere prod modules can.

For anyone looking to make a quick patch mod, the following in data-updates.lua is all that is needed to remap the modules into the productivity category:

for name, prototype in pairs(data.raw["module"]) do
if prototype.category == "overclock" then
prototype.category = "productivity"
end
end