CORRECT! Sunday Punch re-textured the solid booster in V1.05 but if you look in the kerbal space repository,you'll find V1.04 Or look for the posts on the front page EDIT: I just checked and sunday punch reskinned the solids in V1.03 So you'll have to check the front page of this topic
one suggestion, on the bottom fuel tank of the primary engines,put a 2m decoupler to jettison the 2m engine and tank. plus,fuel flows through it! Or you could place SAS modules under each radial decoupler to disable cross feeding