Joe, I'm not sure you are following me. The load on the stab is not there to increase the AOA but to maintain it. I'm not really getting your unicycle comparison because with the rider leaning forward without forward motion would fall forward. Likewise with an airplane with a forward CG would continue in a nose down arc unless an equal force is applied. This force is your up trim. So say your airplane weighs 11 lb even with a forward CG. At cruise speed the up elevator applies 6 oz of force on the stab so now your wing has to support 11lb 6oz while in level flight. Moving the CG back reduces the needed force to maintain the AOA needed to support the weight of the model. Unless I am missing something here but in the past 36 years of flying R/C a CG change has always required a trim change.