don't forget to taste your product often, as it ages....that way your taste buds get the same type of experience that your bourbon is getting. You can also tell the best time to arrest the process. Over aging is an issue to be delt with....there is an off note to too much wood, like the Doc has pointed out.
Adjusting the proof can also help to realize different flavors and attributes when your samples are taken. IIRC, Four Roses cuts all their samples to 40-50 proof when tasting.
Very interesting experiments, good luck!