Im not sure if this is the correct thread to post this, if it isn't could you please tell me where it is? I'm trying to use the USI Exploration mod. When I go into the VAB hanger and load any of the prebuilt probs etc. I cant get any of the stock Kerbal parts to connect with them. Is there a secret to doing this that Im not aware of? Im kinda new to KSP so if this is a basic thing, I apologize in advance Any assistance would be appreciated. Thank you, E