I tried awhile back. still got the tool you can borrow and a small frame legshield piece I didn't use but now might that i have a 50 special.
I never uploaded the video but I think I may have taken one. I can try and get it to you if you want but it's pretty straight forward once you get the hang of it. Just go slow and use a lot of tape to prevent scratches. The video that was posted on there of the italians doing it is gone it seems and I think that had a lot of useful information.
here's the post:
Legshield trim crimp tool
In case I don't make it back though,
Started at the top underneath the handlebars as this would be the hardest area to see if I messed up. first you just crimp it into place with a squeeze. then you start gently crimping it every little bit until it's on there basically. then you gently massage the crimper down and roll it back and forth to evenly distribute the crimp and make it look good.