kco
Veteran Member
I doubt 15-20 grams makes any difference. I run my Caroni TM1900 with knives that are mixed factory knives and clevises and also some flailmaster knives and clevises. The difference in weight for factory vs Flailmaster is more than 20 grams and yet the mower operates without vibration. When it vibrates I know I have lost a set of knives and clevis which must weight about half a pound. But an ounce (30g) or less is not likely to make any difference.
I think you are right. I haven't seen vibration on the mower with the blades ranging from 1021 to 1060 grams. Regardless, it is not much work to grind the sets to within a few grams and it seems like a good idea.