I've been playing with this recently. Had been intending to for a while but having just bought a used Delica I thought I'd have a go:
Looks very tidy from this side, all smooth curves 'n' stuff.
Pics aren't great but you may be able to see the hazards of trying this yourself. It kept slipping and it left grazes on the surface very easily. I tried to clean it up with a brass brush, only succeeding in leaving a brass coloured sheen on that particular area
I may point out that as badly as I did it (first time with a Dremel lol), it is VERY effective. There are no rough edges to catch on clothing either. I am considering buying another Delica to do it to, taking a lot more care next time (am I stupid or what

)
I have also done the 'zip-tie mod' to my SE Delica, but the tie seems to like to rotate slightly around the hole rendering it slightly less effective. The advantage is, as mentioned earlier, is that the tie can be moved to the side to catch more easily on the side of the pocket, and the re-saleability factor is not decreased as it would be with the Dremel mod. I don't buy to re-sell luckily.
One thing that caught me out a few times initially was keeping my fingers out of the way of the opening blade. I have a few parallel scars on my right ring finger as proof!