I've been having a lot of trouble lately getting to Jool with my ground base, space station, two planes, and a couple of rovers (Getting to laythe from Jool orbit should be easy). Each of these have their own nuclear tug (the tugs have 3240 units of fuel and two nuclear rockets). It took me a long time to assemble this in kerbin orbit and now I want to see if this was worth it. I wanted to do a test first so that nothing went wrong, so I took the tug with the ground base and waited for the window to Jool (using ksp transfer calculator). I used the maneuver node to see how much I would need to burn to get to Jool, the best i could get was 1934m/s for a Jool periapsis of about 1,400,000,000. I started my burn, keeping the header on the blue vector. I stopped there cause it seemed like something wasn't right. So first question is, should I keep the header on the prograde vector? Next question is how to lower that huge periapsis before actually getting into Jool orbit? Hope you guys can help me