My warm mod m10 just arrived, haven’t been able to run yet.
I did ask Doug about lo sens/high sens and he said to stick with lo sens. He also said that no attenuation should be needed running mic in.
He also said he’s working on a potential additional mod that would supply 9v. The extra electronics would inhabit one of the former mic spaces. So you could run caps>kcy>adapter cable>m10. That would be way cool, for mics that can run off 9v. Nothing definite yet.