valve spring height question

It's not 20, it's almost 25... so cut the downplay..
I don't have to convince you of anything.I just have to convince the OP to set them up correctly, which I think he's going to do. If you ever took time to notice, most cam manufactures don't like to see seat pressures over 130 when running in cams. With your theory the seat pressure wouldn't matter, just the over the nose pressure. I wonder why they are concerned with the seat pressure .....
My scenario above isn't about if the 25 will or won't wipe the lobe.. maybe you got a dodgy lifter in the bunch. My point is that if you don't set them up to the recommended pressure then you won't have a leg to stand on if there is a failure. The owner and the cam manufacture would totally be within there rights to blame you for the failure.