So, needed some more science before I could build my munar base. Missing a few parts that I need. Decided to send a 'simple' mobile research base to Minmus. Getting the death roll again. As mentioned before, I assume its the CoM issue? Does that mean my payload needs to be lighter, or heavier? Sorry, never really had these issues with the smaller 1.25m rockets. Uncharted territory for me!
Removed the fairing to show payload, if that makes any kind of difference.