Sophont (Triphib) Question...

[ShadowHawke]

I have been looking over the charts and I apologize if this has been brought up before, but what if you have a 'Triphib' sophont? How do you do the Body Structure (STEP 11) there is no column that supports 'Triphib' locomotion-based sophonts?

Can some one either point me in the right direction or can we work out the missing columns for Front/Rear limbs...

Thanks