Fatman
Ahhhh Its good being OLD and having been around vaping a long time
RY4 .... Despite all the above is a RUYAN flavour ... Ruyan were THE FIRST commercial electronic cigarette

THey were horribly expensive ($300+in 2004 ) and actually used an ultrasonic mister and a coil ... only the first model had the mister set-up
cheaper ($150+ ) models followed in 2005 like the modern cigar versions , and they set the Std for what is the e-cig we know today
There were originally 4 different blends of fluid RY1, RY2,RY3, and our beloved RY4

The RY being an abbreviation for RuYan
RY4 was the most popular by an avalanche and as such , when other e-cigs came out , the race was on to produce a fluid similar to Ruyans top preferred blend .... RY4 today has VERY little in common with the original RY4
Now Granpa is going back to the couch for a nap