I am havin a problem with radiator's upgrades... my radiators, even in Sandbox mode, do not advance beyond mk2 but there should be up to mk5.
Also, my maximum heat dissipation changes with the type of reactor attached to the ship. If I attach a Quantum Singularity Reactor, I get 50GW dissipation, a molten salt reactor only gets 4.3?
Sorry if I made some stupid mistake but I could't find anything about this...