I made a Cherry Lime Session IPA last year using lime for the first time. 25 litres (6.6 US Gallons) were put on top of 20g (0.7 oz.) of de-pithed lime zest in secondary. It was way to limey. I considered dumping it, but ended-up drinking it. Next time, I'll use a 1/3 or a 1/4 as much.
So...