What are the downsides of having a company "optimize" a turbine wheel through lightening. Say they take a standard Q-trim wheel and attempt to lighten and balance it. Does anyone have information on any con's to this? I could only think of the fact that it might spin down quicker but I'm sure we'd all take quicker response and give that up. Kinda of like a lightened flywheel. Anyhow, any info appreciated.