Finally Firespitter is back, my thanks to RoverDude and Snjo. This is one of the mods that I always installed since 0.24. But, I think I've encountered a bug. Some parts, i.e. the propeller engine, can't be connected through nodes. I tried to use both firespitter and stock pods but it's the same. Holding Alt button would attach the node in the wrong position. I've included the screenshots below : So far, my installed addons are BDArmory, KerbalEngineer, Infernal Robotics, and I don't think any of these would conflict with FireSpitter.