My -9A CG is full fore when empty. In any circumstance CG can go more aft than the aft limit, of course unless overloading the baggage area.
My -9A has an O-320D1A with a C/S Hartzell, 60 amp. alternator and full instruments.
I would like to move some 7 kg. back: i.e. moving battery from firewall to the rear of the baggage area. That would be enough. Airplane flies OK, but it tends to lower the nose gear soon after landing.
I believe that if you propeller weights less than 15 kg. you will be extra-OK and have a well balanced airplane.
If you will go with an extra light panel and engine accessories and very heavy internal package (seats) maybe you can have aft issues in particular conditions (minimal fuel, heavy pilot and passenger, full baggage) but almost no fore issues.