Interesting adaptation. Three comments:
1. If it works for you and produces results you like, that's awesome.
2. It looks to me like you are rounding off your tips gradually, as the tip slips off the stone at the end of every stroke. I don't know if you're experiencing needle sharp tips or just "kinda sharp tips", but that's what it looks like on video.
3. You can hit every bit of the blade, all the way up to the tip using just the flats of the sharp maker. You just have to raise the handle up as you go through the curve and to the tip, then stop with the tip on the flat.
Again, it's an interesting method and if it works for you, congrats.
Brian.