Mancini/HS 1.6 rocker not giving me the lift expected

I had earlier checked with the checker spring, but got rattled when I was rechecking centerline and pushrod length and decided to check it again. Looking back at my earlier notes; what I saw with checker spring; first pass: .486. Lengthened pushrod to max: .504. Shortened to 1-1 1/2 thread: .502. I see now it is definitely pushrod flex. Thanks for your response.