My rollers were a little flat spotted when removed. Mine was bought in '12 used looking like new and I have probably put 25-50 hours on it since then.
I'd read a 10g roller was good for torque w/o killing top end. A 12g slider should supposedly have the bottom end like a 10g roller without affecting my top end. They are supposed to gear slightly higher. There's some videos about it on YouTube. I figured 12g would be a good compromise. Sometimes I like to open it up on a straight and I didn't want to top out at 30. I was hoping to keep around 40 which I'd had, though it took forever to get there.
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