Nice! I'm really happy you enjoyed the tapping. I'm not alone!!
It's so fun. I still have trouble beating that round consistently, especially the ending when taps have to have longer breaks between them. But I love the challenge.
If you want more of a challenge, download the video
https://www.youtube.com/watch?v=TahFeqo1iiU and play it back at half speed (vlc does a better job of playing at half speed than youtube does). Maybe I'll make another video, which might be a bit more challenging, but I dunno yet. I actually thought I'd get more replies saying that this video is impossibly hard.
About the holding at the bottom stroke:
So when I edge really closely, by stroking very shallow, light and slow (getting slower gradually) I actually can't stand holding my shaft near my balls when my grip is too tight (I think Ms Julie also described this). I could actually go over the edge without moving my hand, just by holding it in that position and I have to let go after a few seconds. It's entirely possible though, that this is because I am not circumcised, as it's also the feeling of my foreskin putting pressure on my cockhead that gets me over the edge. But if you get to edging with slower and slower strokes, you might be able to do this maybe by tightening your grip as needed, even if you are circumcised.
If you try this and can't do it, just try to edge by stroking as slowly as you can. Maybe stroke super slowly upwards, fearing that your hand getting to and over your cockhead will bring you over the edge.