I am definitely not trying but DH and I had another whoopsie moment so I was testing this month. I had a 3 pack of FRER's and each gave me the same line at 10DPO but AFTER the time frame, I think about 18-20 mins after (at first I got this whitish line in the timeframe). It's a pretty convincing evap I think, AF showed up on time so definitely not positive. Also the way I could tell it was an evap was shining a torch behind it and the greyish/purple line was a solid white line, no colour at all. Hoping this sort of result will help compare to a real faint positive (the one where it turns up in the time frame and has colour).