I guess that there must be TWO Videos that Glen did on Tape VS No Tape as he CLEARLY showed that it doesn't make any Frigging difference!!!
Benz, you said; (Your cousin will need to use the EXACT same tape or else have to start over from scratch)?????)
I suggest that you go back and re-watch Glen's video where he tells that while you can use tape to protect a spine while setting a Hard Bevel, there is NO NEED TO USE TAPE TO REFRESH AN EDGE!!!!!!!!!!!!!!!!!!!!!!!
https://www.youtube.com/watch?v=oMchDtXzUO4
The #1 thing about Glen is that he doesn't 'Speculate' he does the research and then puts it to the test and therefore when he posts he has the proof.
I've used the tape for setting a bevel and no tape to refresh many times and I can say that Glen is telling the truth as It Does Work!