Reading some discussions, many KSC players know there are parts that aren't "interesting" because they are flowed. Mk1-2 Command Pod is way too heavy Mk2 Lander-can is too heavy ISRU may be too light PPD-12 Cupola Module is too heavy RC-L01 Remote Guidance Unit is too heavy Kerbodyne ADTP-2-3 could hold some fuel EAS-4 Strut Connector is too heavy and too draggy (usually used to parry joints weakness) Cubic Octagonal Strut is way too light (