Heat generation of ISRU and Drill is not added properly
A craft with 6 Drill-O-Matics and a Convert-O-Tron 250 can be cooled with 4 Medium Termal Control Systems.
How to Replicate:
A Craft with an Engineer, Oretank, 16 Fuel Cell Arrays, 6 Large Drills and a big Convertron can run at full efficiency with one recipe and 6 drills active on one TCS. Only two more Medium TCS are required for a total of three recipes
Each ressource part sould add to the total required cooling, expected is the need for 4 TCS for peak termal efficiency with 6 drills and one recipe.
In addition the ISRU is able to run with 3 recipes and 3 meduim TCS at full efficiency, which should not be possible.