Modern Vespa

First tank through with the new fuel tap - noticing the run-to-reserve transition is pretty much instant. Has anyone else had experience with this?
Also - here's a vid - but my question is and I think I just proved it (looking for verification) - if the tip is in open air in the tank, that's when it's time to flip over to reserve? Just want to make sure something isn't goofed up.
Thanks.
PT

Always a slightly better flow on reserve it seems - so I run it there - I just Always make sure to be aware of gas level.. almost always...

Me too. Most of the time. After all, what's the worst that can happen if you forget to keep an eye on your gas gauge...?

Easy enough then... question. I'm normally just doing laps around the neighborhood etc. How many miles do you normally get on a tank? Of course I can make notes myself, but I haven't had the bike running long enough to "know" - just curious.