idk dude, washers bend way too easy. I made a stack of 2-3 steel washers as a compression cap when I didn't have one, and I still bent the hell out of them. Altogether, the combination of different headtube sizes, having to know EXACTLY where to make the tapered portion of the fork, the fact that you'd pretty much have to run a specific company's fork/undersized HIC combo to get it to work correctly, different stack heights of various headsets making it impossible to make one specific taper length that would work for all scooter/headset combos, I see it being way more trouble than just getting regular HIC or just tapering your bars.
And yeah sorry buddhasRus, I saw that after I replied lol