How did I know you were'nt going to answer my perfectly logical question?

Lets see..................

Can't afford to replace existing mgmt with a decent version so opt to replace an old but good system with a newer but far shiter system!! On top of the cost of the mgmt change you still have to pay for your newer shite system to be remapped so in the long run I think it's a daft solution..................

My advice........if your KE is working well get the car setup properly!!!