Hello, I am building a SSTO and I am having a lot of issues of when I get to space the craft just back flipping of control when I apply thrust only once I get it to space. 100km is the orbit I am trying to establish with the craft. It flies just fine in Kerban atmosphere. The drymass and wetmass are aligned and I use TAC balancer to keep it like so in flight. I don't think it is a mass shift issue, however if you say its that its that. Some things that are needed to know. I modified the thrust output of B9s SaberM and SaberS to be able to push the craft. For the life of me I can't figure out how to get rid of the Red Torque arrow. Below are some pictures [iM ]