Im more of a fan of maxing out the PSI's too. Im going to try to roll around town with a little less for a day to two this weekend and see how that works.
I get about the same 210-220 and the light shows up ....then I fill up about 19 gallons or a little more.
When does your light come on? I have put 20 gal in and have not seen the light! I've only had my VX for a couple of weeks though. It could be burnt out I guess.