Okay, I am having the same problem as the first time i pointed this out. So I downloaded the latest kerbal Space program, I downloaded both the interstellar and the the latest extended version, as i have seen updates for, and that is it(i don't really use tweakscale). The same problems are there for me. Parts need to be orientated a certain way to join, or join incorrectly in order to build stuff but locking other parts out due to orientation. Thermal thrusters and some of the other thrusters don't attach or work. ships explode randomly if i do get them together. I am not sure if tweakscale is important to make this work, i'd like to think not, but after the updates to this mod i hoped things would work. Its a shame because i do like this mod. and this is with totally fresh starts. no other mods and just interstellar and the extended installed. Is there anything else that I am missing or do i need tweakscale or what?