Correct information is subjective, depending on the use to which it will be put. Technically it is correct to say that you can fly a plane slower with the cg at its rearward limit (which is in itself subjective), but how useful is it to know this in isolation? Indeed, in isolation this fact may lead a pilot to believe that a rearward cg is safer.
Take the following scenario: You are flying you Cessna xyz straight and level in perfect conditions at say 5000 feet. You have a very large passenger in the front seat with you. This means the aircraft is flying at its forward most CG limit. Also the aircraft has a very accurate and well calibrated ASI, in good working order. You set power to idle and ease back on the stick until the aircraft stalls at 75kts IAS.
You know push your passenger out The aircraft is now more tail heavy and at its rearmost cg limit. You try the same experiment and the aircraft now stalls straight and true at 70 kts IAS, 5 Kts slower than before. Great! It is technically interesting and proves the theory, but in which way is this knowledge on its own of practical benefit to the model pilot?
I my experience, if I am flying a model that "feels" tail heavy, I trim it down to make it fly faster since I have NO IDEA what its airspeed is. Moreover, any departure from the specific set of condition will change the speed that the aircraft will stall, and even the mode in which it will stall. Change the wing loading, angle of bank, flap or slat position etc, aileron or rudder input, all will change the speed of the stall.
Since the model pilot cannot be accurately aware of many of these conditions, he must fly the model by visual cues combined with being aware of his own stick inputs to judge when then model will stall, and by so doing avoid it. This is the model pilots version of the truth!
WMB has provided us a good example of what can happen if you move the CG too far back, and this is, I suspect with a lightly loaded model.
I reiterate that nose heavy aeroplanes do not fly very well, but tail heavy aeroplanes do not fly very long.
John