The teams were only two
1. Presidential + diluted 2tier - PNU (Uhuru, Karu), Safina (Abdikadir), Wiper (Mutula Kilonzo Sr) and Ruto ODM rebels
2. Bomas hybrid + 3tier - ODM (Madvd, Ababu, etc), Ford-K (Weta)
The PSC 26 members - ODM 13 PNU 13. Ruto & Isaac rebelled against ODM and tilted the scales.
Was Karua representing PNU which included Uhuru by any chance?
Fact is COE recommended Hybdrid system. ODM proposed pure presidential system - and was seconded by Karua - who was also in the anti-Ruto-Uhuru-Kalonzo team.