ChemHero

Good day Sirs and Sirettes! I was only recently introduced to KSP, by a friend who had himself been shown the game by another friend. We are all quite hooked and determined to master all the intricacies of the game. I subsequently joined the appropriate sub-section of reddit.com (reddit.com/r/kerbalspaceprogram) which lead me here. I wondered if someone could point me in the direction of some add-ons, in particular the KSP Stock Part Expansion. Thanks C.H.