Yes! All of the pens will ship with the Pilot Hi-Tec-C / G-Tec cartridge, 0.4mm size. I'd suggest you get a bunch of different colors and sizes from your favorite web merchant to figure out what is perfect for you!
You will not be charged until March 28 - and then, only if I've reached my $7,000 funding target. If I'm below $7k then, the project ends and nobody gets charged. If I succeed in raising the funds, you'll be charged on March 28th and I'll get to work making the pens!