I'm confused Pat. This comes from using bricks for pistons like the old TRW's. There are so many available options to reduce weight at a reasonable cost. I ask this in all honesty without trying to argue or doubt your judgement, do you feel his bob weight is good? Seriously, I desire info from other builders as the next guy. Shelf pistons brings up a good point, I have found the "Elites" to be as affordable as the shelf styles. Help me out here Pat, I have a different attitude about this and would like to know more from others.