kmkshakey

I found this comment on a Scott Manley video concerning savefile editing: "Semi-major axis is the equal to your periapsis and apoapsis divided by 2, minus the radius of the planet. This should help with any mock ups you're having with either being inside the planet or being too far away". I'm a KSP rookie...can anyone confirm the accuracy of this statement, and verify whether or not it helps with this plugin?