Just wanted to jump in with a few more insights….
1) The distinction should be made between the 3 different Keg systems (F, H, and GVP)
2) The cone DOES fit entirely inside the can in both the Keg-H and the Keg-GVP
3) The Keg-H can is going to survive being packed "loose" better than the Keg-F or Keg-GVP. The structural ridges inherent in the can are a real "strength" :-)
4) We form a ridge in the body of the Fosters (F & GVP) cans to support it on the cone. This allows the can to be lighter than the Heineken that requires the "beer bands" to support it on the cone. However, this also introduces a strong "ring" in the center of what is normally a very weak can….and without getting into a lot of Strength of Materials or Stress Concentration Riser calculations or the concept of Low Cycle Fatigue, if you repeatedly flex this Fosters can unprotected in your pack, you can introduce pinholes along that ring. Now I wouldn't worry about that too much because one way to look at this is to consider the Fosters can as an expendable item, use it a few trips, drink a beer some night, new pot! You will need to get a sidecut can-opener but that would be it because the beer band that comes with the kit can be used as the pot support for your new can!
That's my $.02…..love reading the real life field experiences….thanks!
Rand :-)