To be quite honest, I think this system with stat bases is quite confusing. I understand the need for splitting the physical and mental, but not the race, which I imagine is only a modifier to the physical in most cases.
I’d rather advice a much more common system of attributes (stats of physical nature: endurance, strength, intelligence, etc.) and skills (stats of mental nature, something the character has learned: stealth, heavy weapons, engineering, smithing, etc.).
The attributes would probably interact with the skills in some way, either governing them or making them easier to acquire, but not the other way around. Activities would be modified or decided by skill checks, stats like stamina and health influenced by attributes.
I think it’s also important to make the connections between the stats, attributes and skills rather loose, to allow for a plethora of modifiers to them all and the connections themselves, making the system very flexible and fitting the original “racial base” and all kinds of gear.