I have also started to use tape (9mm is pathetic, it's tacky and I hate it. I don't think you can go past an M60 fired from the hip, really... though an 80mm Carl Gustav anti tank weapon is fun, esp firing illum rounds, as are RBS70 Surface to Air Missiles, but now I'm going off on a tangent from the tangent) I shall continue to use tape..the tape I currently use is yellow...
Seriously, though, I do understand the logic in regards to angles, etc.
I followed this link hibudgl100's Channel - YouTube last night from another post here. He talked of layers of tape, etc at the end. It makes really good sense, he puts it in a really matter of fact way without any BS...I also found 'Straight Razor Sharpening Part 1' very beneficial...