This isn't installed yet because I'm deciding on flexible hose type vs partial ridgid, but the pictures tell the tale.
The clear part of the funnel takes the place of the filler cap, a flexible 2"+- hose is ran to the locking water fill unit.
It's probably way less than an hour to drill the big hole, three screws, two clamps and replace the filler cap.
I'll probably never do my own oil changes because I did the math(AFTER I bought this set up) and saving 400 over the next ten years isn't worth the disposal problems.
But, I'll do this mod anyway to make life easy on anyone involved.
Edit:
It just dawned on me. Radiator hose is perfect. I'll check it's oil resistance.
http://www.siliconeintakes.com/elect...8aAl5mEALw_wcB
Found this in a three second Google search.