I highly recommend you check out Flounder's blog, here, especially his post on the third version of the vacumatic 616, complete with great pictures! He has mentioned on the Fountain Pen Network that he has another, special, pen modification project in progress, so be sure to watch his blog for future updates. If it is anything like his Hero 616 mod, it is certain to be impressive.
- An article from David Nishimura at VintagePens.com, detailing the Parker Vacumatic filling mechanism.
- Flounder's profile on the Fountain Pen Network (be sure to check his blog, first, for information on his pen modifications).
- The Pay It Foward 2012 thread (now closed) on the Fountain Pen Network with details about Flounder's "pay it forward" of the Hero 616, mark 3, vacumatic fountain pen. (NOTE: A recipient has already been chosen.)