RE: How lite is too.....
I shoot about 15,000 arrows per year at 5 grains per lb. 4 years with my Clearwater and 2 years with my Martin MV2. No problems at all. No wear on my axle bushings. Changed string and cables each year though. But, I think the year of your bow is before the technology in bow mfg. started to support the 5 gr/lb push. I don't think I would go it with yours. If my memory serves me right (which it rarely does at my age) AMO recommends 6 gr/lb at 30" draw, and they support even less at shorter draws. I don't remember how much though.