Anyone using the 440 Source Hydraulic Roller Lifters?

I got my RMA number from 440 Source today so the lifter will go back Wednesday....I did slip a set of lifters back in on one of the cam lobes that was almost at top height and the top oil band had plenty left in the lifter bore...I plan on making a comparision to the Comp Camp lifters when they arrive before shipping back the 440 Source lifters...8)