The Mamba folks told me in Toledo that their turbine is more fuel efficient than ano other 11-12 pound thrust turbine on the market today. That sounds good to me, but would there be any benefit in fitting another compressor stage to get the pressure ratio higher. Would there be a good fuel economy benefit? I would be willing to pay a higher initial turbine price for reduced fuel flow.
Also I hate the idea of a starter right infront of the turbine due to FOD. Has anyone tried a starter mounted inside the front cover?

What are your thoughts?